Answers
Answer:
Researchers often choose random sampling as a method for selecting participants or data points from a larger population. Random sampling is a fundamental principle in research design and is valued for its ability to enhance the representativeness and generalizability of the findings. Here are a few reasons why researchers choose random sampling:
Representative sample: Random sampling helps to ensure that each member of the population has an equal chance of being selected for the study. This randomness minimizes the potential for bias and ensures that the sample is representative of the larger population. By selecting participants randomly, researchers can obtain a sample that closely mirrors the characteristics and diversity of the population, allowing for more accurate generalizations and inferences.
Related Questions
Write an equation of a quadratic equation that has x-intercepts: 3, 6 and point (2, -2). (Intercept Form)
Answers
(x - 3)(x - 6) = 0
Expanding this equation gives:
x^2 - 9x + 18 = 0
Now we need to use the point (2, -2) to find the equation in intercept form.
First, substitute x = 2 and y = -2 into the standard form of a quadratic equation:
y = ax^2 + bx + c
-2 = a(2)^2 + b(2) + c
-2 = 4a + 2b + c
Next, substitute the x-intercepts into the equation:
y = a(x-3)(x-6)
We want the equation in intercept form, so we expand this equation:
y = a(x^2 - 9x + 18)
y = ax^2 - 9ax + 18a
Now we can use the three points we have to form a system of equations:
-2 = 4a + 2b + c
0 = 9a - 54a + 18a
0 = 3a
The last equation tells us that a = 0, which means the quadratic equation is a linear equation:
y = bx + c
To solve for b and c, we use the other two equations:
-2 = 4a + 2b + c
0 = 9a - 54a + 18a
Plugging in a = 0 into the first equation, we get:
-2 = 2b + c
Simplifying the second equation gives:
0 = -27a
Since a = 0, this equation is true and does not give us any new information.
We can now solve for b and c by solving the system of equations:
-2 = 2b + c
0 = -27a
Since a = 0, we can ignore the second equation and solve for b and c using the first equation:
2b + c = -2
We still have one degree of freedom, so we can choose any value for b and solve for c. Let's choose b = 1:
2(1) + c = -2
c = -4
Therefore, the equation of the quadratic function in intercept form is:
y = (x-3)(x-6)
or
y = x^2 - 9x + 18
which has x-intercepts at 3 and 6 and passes through the point (2, -2).
A hospital administrator is examining the amount of time its care teams spend with patients. He finds that the care teams are spending an average of 22 minutes per patient with a standard deviation of 17 minutes, distributed normally. What amount of time separates the lowest 60% of the means of time spent with patient from the highest 40% in a sample size of 40 care teams? Use the z-table below:
Answers
Next, we can calculate the z-scores using the formula:
z = (x - μ) / SEM
where x is the sample mean, μ is the population mean (which we don't know), and SEM is the standard error of the mean.
For the lowest 60% of means, we want to find the z-score that corresponds to the 20th percentile (since 60% is the area below the 80th percentile). Using the z-table, we find that the z-score for the 20th percentile is -0.84.
z = -0.84
-0.84 = (x - μ) / 2.68
-2.25 = x - μ
For the highest 40% of means, we want to find the z-score that corresponds to the 60th percentile (since 40% is the area above the 60th percentile). Using the z-table, we find that the z-score for the 60th percentile is 0.25.
z = 0.25
0.25 = (x - μ) / 2.68
0.67 = x - μ
Now we have two equations with two unknowns (x and μ):
-2.25 = x - μ
0.67 = x - μ
Solving for x, we get:
x = -0.79 (for the lowest 60% of means)
x = 0.93 (for the highest 40% of means)
Therefore, the amount of time that separates the lowest 60% of means from the highest 40% is:
0.93 - (-0.79) = 1.72 minutes.
when should a researcher use line graphs to communicate data and why
Answers
Answer: They are most useful for showing trends and for identifying whether two variables relate to (or "correlate with") one another.
Explanation:
https://www.mindtools.com/pages/article/Charts_and_Diagrams.htm#:~:text=Line%20graphs%20simply%20use%20a,correlate%20with%22)%20one%20another.
Based on your own knowledge and opinion, what do you believe will be the most common job in New York in 2030? In one paragraph, explain your rationale.
Answers
Answer:
According to research and current trends, some of the most in-demand jobs in New York by 2030 could be related to technology, healthcare, and sustainability. With the ongoing digital transformation, the demand for IT professionals, software developers, and data analysts is expected to increase. The healthcare industry is also growing due to the aging population and advances in medical technology. Moreover, with the growing concerns about climate change and sustainability, there could be a rise in jobs related to renewable energy, environmental science, and green technology.
Kylie works for a large nursery and is investigating whether to use a new brand of seeds. The new brand of seeds advertises that 93% of the seeds germinate, which is higher than the germination rate of the seeds she is currently using. She will change over to this new brand unless the actual germination rate is less than what is advertised. Kylie conducts an experiment by randomly selecting 76 seeds of the new brand and plants them. She finds that 70 of those seeds germinated. What are the null and alternative hypotheses for this hypothesis test?
Answers
The correct null and alternative hypothesis for the hypothesis test will be: B. H0: p=0.93
H a: p<0.93
What is the null and alternative hypothesis?The null hypothesis is a type of scientific prediction that shows no correlation between variables whereas the alternative hypothesis indicates a connection between some variables.
So, for Kylie's experiment above, the null hypothesis indicated by H0: p=0.93 indicate the absence of a relationship while the alternative hypothesis indicates a relationship of less than 93%.
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discuss aspects of public relations practices
Answers
Answer:
Explanation:
Best Practices for Developing Strong Public Relations
- DEVELOP KEY MESSAGES THAT DIFFERENTIATE AND STRENGTHEN THE COMPANY.
- MATCH COMPANY ACTIONS TO DESIRED EXTERNAL IDENTITY.
- GENERATE MEDIA INTEREST.
- USE THE INTERNET TO CREATE COMMUNITIES OF INTEREST.
- ALIGN PUBLIC RELATIONS WITH MARKETING STRATEGY.
- PLAN FOR CRISIS SITUATIONS.
hope it helps
Answer:
Researching, planning, communicating and evaluating
Explanation:
brainly.com when the united states steel cooperation was created in 1902, it was the largest corporation America had known
Answers
Answer:
True.
Explanation:
The U.S steel corporation was the 1st billion dollar corporation.
2. In its first year, “DM Trading” had the following experience: Unit selling price birr 100 Sales 50,000 units Total fixed cost birr 400,000 TVC birr 3,000,000 Required: a) Develop TR, TC and profit functions for the company in terms of quantity b) Find the breakeven point in terms of quantity and sales volume.
Answers
a) The total revenue (TR) function can be calculated by multiplying the unit selling price by the quantity sold.
In this case, TR = 100 * Q, where Q represents the quantity sold. The total cost (TC) function consists of the sum of fixed costs (FC) and total variable costs (TVC). Given that the fixed costs are 400,000 birr and the TVC is 3,000,000 birr, the TC function can be expressed as:TC = FC + TVC = 400,000 + 3,000,000 = 3,400,000 birr.
The profit function (P) can be determined by subtracting the total cost from the total revenue, so P = TR - TC = 100Q - 3,400,000 birr.
b) The breakeven point can be found by setting the profit function equal to zero, as this is the point where total revenue equals total cost.
In this case, 100Q - 3,400,000 = 0. Solving for Q, we find Q = 3,400,000 / 100 = 34,000 units. Therefore, the breakeven point in terms of quantity is 34,000 units. To calculate the sales volume at the breakeven point, we can multiply the breakeven quantity by the unit selling price:Sales Volume = 34,000 units * 100 birr/unit = 3,400,000 birr. Hence, the breakeven point in terms of sales volume is 3,400,000 birr.
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Suppose the heights of 18-year-old men are approximately normally distributed, with mean 66 inches and standard deviation 5 inches. What is the probability that an 18-year-old man selected at random is between 65 and 67 inches tall?
Answers
Answer: We can start by standardizing the values using the standard normal distribution:
z_1 = (65 - 66) / 5 = -0.2
z_2 = (67 - 66) / 5 = 0.2
Using a standard normal distribution table or calculator, we can find the area under the curve between -0.2 and 0.2:
P(-0.2 < Z < 0.2) = 0.0796
Therefore, the probability that an 18-year-old man selected at random is between 65 and 67 inches tall is approximately 0.0796 or 7.96%.
Explanation:
Before a site begins recruitment, a protocol monitor will conduct
a visit to review the data the research site has collected from
study participants.
Answers
Initiation visits occur before a study site begins participant recruitment for protocol participation and after the necessary IRB permissions are obtained. During a site initiation visit, study monitors review trial records to ensure that they are complete and in order.
What is Protocol Monitor?
The experimental Protocol Monitor displays the underlying requests and reactions happening over the DevTools protocol. For example, when considering some JavaScript via DevTools, observe the following notes on the protocol: Runtime.
How do I turn off Developer Tools on my phone?
You can disable the Developer options and hide the menu by opening Locations, and then tapping Developer options. Tap the switch at the top of the net to turn off Developer options.
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Carlos describes himself as a "heterosexual, male, Latino, and first-generation college student." This description refers to Carlos's
Answers
Carlos describes himself as a "heterosexual, male, Latino, and first-generation college student." This description refers to Carlos's standpoint
What is Gender?The social, psychological, cultural, and behavioral facets of having a gender identity—whether it be male, female, or another—are all included in gender.
Hence, by mentioning his gender, race, and sexual orientation, this shows to prove the standpoint of Carlos from a multi-faceted perspective.
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PLEASE ANSWER ASAP WILL GIVE BRAINLIEST ITS TIMED!!!
A ____ test depends on the test takers ability to recall specific information.
A.) True/false
B.)Matching
C.)Best answer
D.) None of these
Answers
Answer:
b
Explanation:
Answer:
D
Explanation:
"None of these" is the answer
[language arts]Select the author's perspective in "Human Impact on our Environment"?
[A] Animals cannot survive without human help.
[B]Ecosystems are dependent on human behavior.
[C] Pollution kills 100,000 marine animals every year.
[D] The biggest problems for the environment are caused by humans.
Answers
[D] The biggest problems for the environment are caused by humans.
The author's perspective in "Human Impact on our Environment" can be identified as D) The biggest problems for the environment are caused by humans.
This perspective implies that human activities have a significant and detrimental effect on the environment.
It suggests that humans, through their actions and behaviors, are the primary cause of environmental issues and challenges we face today.
The author likely believes that factors such as pollution, deforestation, habitat destruction, overconsumption, and climate change are predominantly driven by human actions.
This perspective aligns with scientific consensus and extensive research on the topic.
Numerous studies have shown that human activities, particularly industrialization and unsustainable practices, have led to a range of environmental problems.
These problems include air and water pollution, loss of biodiversity, habitat degradation, and climate change.
By emphasizing the impact of human actions on the environment, the author likely aims to raise awareness and promote a sense of responsibility for addressing these issues.
It suggests that changes in human behavior, policy interventions, and sustainable practices are necessary to mitigate and reverse the negative effects on the environment.
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hhhhhhhttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttrffffffffffffffff6t855ty
Answers
Answer:
? what
Explanation:
Answer:
hgkgkgkugkgkvmgjhgjgjyfjyfjyfygjygjygfjfjhgjhgjhgjhgkgkhgkgjugjugkugkugukgukgkugkugkugjhfngdbrsbrdbtfmhhkohiydeqweaeaegxgrxbt bgcnyfjygmugmugkug,jbkjhhljb,bmbmvgnfbgdgfxfgsvdxgdsaqwe12368yhudjyfjyghyenyfdhnsnhfdmhgfmjgfmjgmjfmjyfmjyfmjyfmjyfmjyfmjgf,jhf,jhf,jgfmjgvmjyfmjyfnhtdnyrsht4st3wgt3whteejytd7f,igogukgkkhgmhvngfngfngcbgcbfdhfxhtdhgdhdjgfngdgrsgrdgbcngvjhvkhbkblilhihjyfgrwfeahtdj,rytsgrxhyflihliyhtehtfjhghtdhggcngcgfshgcmgfmhgjhfhtdhgfjyfjyfkuglihkiy,jh,jgmhhfghdgrswrgrdhgcngvmhtjyt,jhjyfngvmhb,jgmjgmjgmhfbtdbgcngv hb,b,khlhkugjythteyregrebgdfmhvmhg,jh,kh.ojlihliuliykutkutjythtegrwgrsbtdngcmhv nbj,b,jh,h,hkigkutjtdyrsgfx vcmhvmhgmjgmuggu
A circle has a radius of 5 ft, and an arc of length 7 ft is made by the intersection of the circle with a central angle.
Which equation gives the measure of the central angle, a?
o
Om7+5
O 0.75
Answers
Answer:
1.4 radians
Explanation:
7 = a/360 * 2(pi)(5)
a is approximately 80.21 degrees.
80.21(pi)/180 is approximately 1.4 radians
65 percent of consumers prefer to purchase electronics online. You randomly select consumers. Find the probability that the number of consumers who prefer to purchase electronics online is (a) exactly five, (b) more than five, and (c) at most five.
Answers
Answer:
Explanation:
To calculate the probabilities, we can use the binomial probability formula. In this case, we have a binomial distribution with the following parameters:
Probability of success (p): 65% or 0.65
Number of trials (n): The number of consumers randomly selected
Number of successes (k): The number of consumers who prefer to purchase electronics online
(a) To find the probability that exactly five consumers prefer to purchase electronics online, we can use the formula:
P(X = k) = (nCk) * p^k * (1 - p)^(n - k)
Plugging in the values, we get:
P(X = 5) = (nC5) * 0.65^5 * (1 - 0.65)^(n - 5)
(b) To find the probability of more than five consumers preferring to purchase electronics online, we need to calculate the cumulative probability from k = 6 to the maximum number of consumers randomly selected. This can be calculated as follows:
P(X > 5) = 1 - P(X <= 5)
(c) To find the probability of at most five consumers preferring to purchase electronics online, we need to calculate the cumulative probability from k = 0 to k = 5. This can be calculated as follows:
P(X <= 5) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)
what is a properly of matter give me 5 examples
Answers
Explanation:
Density, colour, hardness, melting and boiling points, and electrical conductivity are all examples of physical properties.
Which economic concept allows business to freely buy and sell goods as see fit?
Answers
Answer: property rights
Explanation: ap*x
The table below gives the percent of children under five considered to be underweight.
Percent of Underweight Children Number of Countries
16–21.45 21
21.45–26.9 4
26.9–32.35 9
32.35–37.8 8
37.8–43.25 7
43.25–48.7 2
What is the best estimate for the mean percentage of underweight children? (Round your answer to two decimal places.)
Answers
The best estimate for the mean percentage of underweight children is of 27.7%.
----------
The best estimate for the mean percentage is found using the sums of the multiplications of the relative frequencies and the halfway point of each interval.In total, there are 21 + 4 + 9 + 8 + 7 + 2 = 51 countries.The halfway points and relative frequencies are:
(21.45 + 16)/2 = 18.725, with a relative frequency of 21/51 = 0.4118,(21.45 + 26.9)/2 = 24.175, with a relative frequency of 4/51 = 0.0784,(26.9 + 32.25)/2 = 29.575, with a relative frequency of 9/51 = 0.1765,(32.35 + 37.8)/2 = 35.075, with a relative frequency of 8/51 = 0.1569,(37.8 + 43.25)/2 = 40.525, with a relative frequency of 7/51 = 0.1373,(43.25 + 48.7)/2 = 45.975, with a relative frequency of 2/51 = 0.0392.----------
The best estimate for the mean percentage is:
\(p = 18.725(0.4118) + 24.175(0.0784) + 29.575(0.1765) + 35.075(0.1569) + 40.525(0.1373) + 45.975(0.0392) = 27.7\)
27.7%.
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lead your team in a conversation using 4Ds examples
Answers
The team conversation using 4Ds is given below.
What is the explanation for the above response?Team, we have a new project ahead of us and we'll be using the 4Ds framework to guide us through the process. The first step is Define. Let's start by clearly defining the problem we're trying to solve and what our goals are for this project.
Next, we'll move on to the Discover stage. This is where we'll research and brainstorm potential solutions to the problem we've defined. We'll explore new technologies, best practices, and gather feedback from users.
Once we have a good understanding of our options, we'll move on to the Develop stage. Here, we'll select the best solution and create a prototype, test it, and iterate until we have a final product that meets our goals.
Finally, we'll move on to Deliver, where we'll launch the product to the market and monitor its success. We'll gather feedback from users and make any necessary improvements based on the data. Remember, the 4Ds framework is a powerful tool that will help us make informed decisions and take a thorough approach to problem-solving. Let's use it to our advantage.
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Pleaseee i need helppp
Which of these has the most influence on ocean tides?
A: The magnetic field of the Earth
B: Electrical forces in the atmosphere
C: Radiation from the sun
D: Gravity between the Earth and the moon
Answers
Answer:
gravity between the earth and the moon
Explanation:
the moon and sun control the tides. however, the moon influences the tides most. the moons gravitational pull on the earth is strong enough to tug on the ocean creating tides.
Answer:
Gravity between the earth and the moon :)
Explanation:
This is correct because I had the same assignment. :0
In all of the FNAF universe who's the most animatronic that you love and desire to be in that perspective it couldn't be even a human etc for example like William Afton!
Answers
Answer: I would want to be Nightmare or Goldie from FNaF 4 Because theyre scary :)
Explanation:
How is a ratio table used to graph equivalent ratios?
A. Find the value of each ratio as a fraction and plot the fractions on a number line.
B. Find the differences of the values in the ratio table and plot the differences on a number line.
c. Use the values in the ratio table to write coordinate pairs for the points on the graph.
D. Use the equivalent ratio in lowest terms to plot the numerator on the x-axis and the denominator on the y-axis, then connect the two points
Answers
C. Use the values in the ratio table to write coordinate pairs for the points on the graph.
how dose the king begin the letter? what is the impact of king's choices?
Answers
Answer:
The unwise and untimely engagement of non-violent direct action
Explanation:
a blank includes all type of colleges
Answers
Answer: Post Secondary education
Explanation:
Post Secondary education includes all types of college. This could be defined as a junior college, technical college, a two or four year university, or certificate program. This type of education follows completion of a high school education and diploma.
Nas is conducting his parents find out the fraction of people who blackout from GeForce is greater than six in early study population proportion was estimated to be 0.36 how large of a sample would be required in order to estimate the fraction of people who black out and six or more G force is at 80% the level of air most 0.04 round your answer to the next integer
Answers
Answer:
Give me a glass of water,?
Should I have coffee or hot chocolate???
Answers
Answer:
Hot chocolate
Explanation:
Very Good!!!
Sandra’s Purse Boutique has the following transactions related to its top-selling Gucci purse for the month of October. Sandra's Purse Boutique uses a periodic inventory system. Date Transactions Units Unit Cost Total Cost October 1 Beginning inventory 6 $ 820 $ 4,920 October 4 Sale 4 October 10 Purchase 5 830 4,150 October 13 Sale 3 October 20 Purchase 4 840 3,360 October 28 Sale 7 October 30 Purchase 8 850 6,800 $ 19,230 2. Using FIFO, calculate ending inventory and cost of goods sold at October 31.
Answers
The cost of goods sold for the month of October using the FIFO method is $11,490 and the cost of the ending inventory is $6,840.
FIFO is one of the most commonly used inventory accounting methods. FIFO stands for First-In, First-Out, and it means that the first inventory items that enter a warehouse or storage location are the first to leave.
FIFO is often used in industries where products have an expiration date, like food and beverage, and it's also popular with companies that sell items that can quickly become obsolete, like technology or fashion companies.
Here, we are given the following transactions related to Sandra’s Purse Boutique and we need to calculate the ending inventory and cost of goods sold using the FIFO method.
Date Transactions Units Unit Cost Total Cost October 1 Beginning inventory 6 $820 $4,920 October 4 Sale 4 October 10 Purchase 5 $830 $4,150 October 13 Sale 3 October 20 Purchase 4 $840 $3,360 October 28 Sale 7 October 30 Purchase 8 $850 $6,800
We will calculate the cost of goods sold and ending inventory step by step using the FIFO method as follows:
As we are using FIFO, the first goods purchased are assumed to be sold first, and therefore, the cost of goods sold is calculated by using the unit cost of the oldest purchase transactions. Cost of goods sold (COGS) = Cost of oldest inventory * Units sold from oldest inventory to newest inventory
First, we will calculate the cost of goods sold for the first sale of 4 units on October 4. The first 4 units of inventory sold are from the beginning inventory of 6 units, which were purchased at a unit cost of $820.
Therefore, COGS = 4 * $820 = $3,280
Similarly, we will calculate the cost of goods sold for the second sale of 3 units on October 13. The first 2 units of inventory sold are from the beginning inventory of 6 units, which were purchased at a unit cost of $820. The remaining unit is from the purchase of 5 units on October 10, which were purchased at a unit cost of $830.
Therefore, COGS = (2 * $820) + (1 * $830) = $2,470
Finally, we will calculate the cost of goods sold for the third and final sale of 7 units on October 28. The first 2 units of inventory sold are from the beginning inventory of 6 units, which were purchased at a unit cost of $820. The next 4 units of inventory sold are from the purchase of 4 units on October 20, which were purchased at a unit cost of $840.
The remaining unit is from the purchase of 5 units on October 10, which were purchased at a unit cost of $830. Therefore, COGS = (2 * $820) + (4 * $840) + (1 * $830) = $5,740
Hence, the total cost of goods sold for the month of October using the FIFO method is $3,280 + $2,470 + $5,740 = $11,490
Now, we will calculate the ending inventory for the month of October. The ending inventory will include the remaining units that were not sold. We will first calculate the total units available for sale by adding the beginning inventory and the purchases made during the month.
Total units available for sale = Beginning inventory + Purchases
Total units available for sale = 6 + 5 + 4 + 8 = 23 units
Now, we will calculate the ending inventory using the FIFO method. The ending inventory will include the newest units purchased during the month. Units sold during the month = 4 + 3 + 7 = 14 units.
Therefore, the remaining units in the inventory = Total units available for sale - Units sold during the month
Remaining units in the inventory = 23 - 14 = 9 units
The 9 units in the ending inventory are from the last purchase of 8 units made on October 30, and the remaining unit is from the purchase of 4 units made on October 20.
Therefore, the total cost of the ending inventory using the FIFO method = (8 * $850) + (1 * $840) = $6,840
Therefore, the cost of goods sold for the month of October using the FIFO method is $11,490 and the cost of the ending inventory is $6,840.
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The mean diastolic blood pressure for a random sample of 80 people was 82 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 12 millimeters of mercury, find a 99% confidence interval for the true mean diastolic blood pressure of all people. Then give its lower limit and upper limit.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
Answers
The 99% confidence interval for the true mean diastolic blood pressure of all people is approximately (73.4, 90.6) and The lower limit is 73.4 millimeters of mercury, and the upper limit is 90.6 millimeters of mercury.
To calculate the 99% confidence interval for the true mean diastolic blood pressure of all people, we can use the formula:
Confidence Interval = Sample Mean ± (Critical Value) * (Standard Deviation / √(Sample Size))
Given that the sample size is 80, the sample mean is 82, and the standard deviation is 12, we need to find the critical value corresponding to a 99% confidence level.
Since the sample size is large (n > 30) and the population standard deviation is known, we can use the Z-distribution. The critical value for a 99% confidence level (α = 0.01) is approximately 2.576.
Plugging in the values into the formula, we get:
Confidence Interval = 82 ± (2.576) * (12 / √80)
Calculating the values:
Confidence Interval = 82 ± (2.576) * (12 / √80)
≈ 82 ± (2.576) * (12 / 3.577)
≈ 82 ± (2.576) * 3.358
≈ 82 ± 8.647
Rounding to one decimal place:
Lower Limit = 82 - 8.647 ≈ 73.4
Upper Limit = 82 + 8.647 ≈ 90.6
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The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about 69 mm ("Annual maximums of," 2013). Assume rainfall is normally distributed.
c. If a year has a rainfall less than 100mm, does that mean the year is an unusually dry year? Why or why not? Do not use the word "it" in your reason for why or why not.
Answers
Answer:
I hope this answers the question
Explanation:
