The standard deviation of the data set is approximately 2.096.
To calculate the measures of variability for the given data set (4, 5, 3, 4, 7, 8, 9), we will calculate the range, variance, and standard deviation step by step.
Range:
The range is the difference between the maximum and minimum values in a data set.
Maximum value = 9
Minimum value = 3
Range = Maximum value - Minimum value
Range = 9 - 3
Range = 6
So, the range of the data set is 6.
Variance:
The variance measures the average of the squared differences from the mean. The formula for variance is:
Variance = (Σ(xᵢ - μ)²) / n
where:
xᵢ represents each data point
μ represents the mean of the data set
n represents the total number of data points
First, let's calculate the mean (μ):
μ = (4 + 5 + 3 + 4 + 7 + 8 + 9) / 7
μ = 40 / 7
μ ≈ 5.71
Now, we can calculate the variance:
Variance = [(4 - 5.71)² + (5 - 5.71)² + (3 - 5.71)² + (4 - 5.71)² + (7 - 5.71)² + (8 - 5.71)² + (9 - 5.71)²] / 7
Variance = [(-1.71)² + (-0.71)² + (-2.71)² + (-1.71)² + (1.29)² + (2.29)² + (3.29)²] / 7
Variance = [2.9241 + 0.5041 + 7.3441 + 2.9241 + 1.6641 + 5.2641 + 10.8041] / 7
Variance ≈ 30.75 / 7
Variance ≈ 4.39
Therefore, the variance of the data set is approximately 4.39.
Standard Deviation: The standard deviation is the square root of the variance. We can calculate it using the formula:
Standard Deviation = √Variance
Standard Deviation = √4.39
Standard Deviation ≈ 2.096
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Evaluate the expression when x = 6 and y = -4. 6x - 5y
Hi ;-)
\(\text{x}=6 \ \text{and} \ \text{y}=-4\\\\6\text{x}-5\text{y}=6\cdot6-5\cdot(-4)=36+20=\boxed{56}\)
Answer:
56
Step-by-step explanation:
x = 6 and y = -4
Substituting the values in the equation,
6(6) - 5(-4)
=> 36 + 20
=> 56
6+7m<6m or 3m-7<5+6m
Step-by-step explanation:
6+7m<6m or 3m-7<5+6m
6<7m+6m or 3m-6m<5+7
6<13m or -3m<13
m<13/6 or m<13/-3
m<2.16 or m<-4.333
m<2.2 or m<-4.34
An experimenter is randomly sampling 3 objects in order from among 42 objects. What is the total number of samples in the sample space
To calculate the total number of samples in the sample space when randomly sampling 3 objects in order from among 42 objects, we need to consider the concept of permutations.
A permutation is an arrangement of objects in a specific order. In this case, we are interested in the number of permutations when selecting 3 objects from a pool of 42 objects.
The formula to calculate permutations is given by nPr = n! / (n - r)!, where n is the total number of objects and r is the number of objects being selected.
In our case, n = 42 (total objects) and r = 3 (objects being selected). Therefore, the total number of samples in the sample space can be calculated as 42P3.
By substituting the values into the formula, we have 42P3 = 42! / (42 - 3)!
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It takes 8 workers 5 hours to build 2 cars. Assuming they work at the same speed , how long does it take 2 workers to build 8 cars
Answer:
80 hours for 2 workers to build 8 cars
Step-by-step explanation:
2 cars / 8w *5 hr = 2 cars / 40 hrs 1 car takes 20 hrs
8 cars * 20 hours = 160 hours required
two workers split this time 160/2 = 80 hours
constant proportionality of 5 spring rolls and 2 people with no explanation
Solve the system of equations -4x-y=18
Helpppp meee pleaseee
Solve for b.
5 = b/2
Answer: b=10.
Step-by-step explanation: 5=b/2 b/2=5 2b/2=(5)(2) b=10
there are 3 quarters, 5 dimes, and 2 nickels, in a jar. P(dime then dime without replacement)?
What’s it the slope of the line
Answer:
3/4
Step-by-step explanation:
the graph point starts at the y-intercept 1 and then moves 4 digits forward and 3 digit upward
Answer:
Since the slope doesn't go down we can safely ignore -3/4 and -4/3.
The slope goes up 3 and 4 to the right.
y = 3
x = 4
y/x
so the answer is 3/4
Please help me solve this
Given :-
Two parallel lines intersected by a transversal .To Find :-
The angle .Solution :-
As we know that when two parallel lines is intersected by a transversal then the corresponding angles are equal . Here 15x - 5 and 14x +4 are corresponding angles . So ,
\(\red\longrightarrow\) 15x - 5 = 14x + 4
\(\red\longrightarrow\) 15x - 14x = 5+4
\(\red\longrightarrow\) 15x - 14x = 9
\(\red\longrightarrow\) x = 9
Hence the angle is ,
\(\red\longrightarrow\) 14x + 4
\(\red\longrightarrow\) 14(9) + 4
\(\red\longrightarrow\) 126 + 4
\(\red\longrightarrow\) 130°
Hence the required answer is 130° .
Explanation :
15x - 5 and 14x +4 are corresponding so we have to do it like,
↣ 15x - 5 = 14x + 4
↣ 15x - 14x = 5+4
↣15x - 14x = 9
↣ x = 9.
Hence the angle is ,
↣14x + 4
↣14(9) + 4
↣ 126 + 4
↣ 130°
Hence the required answer is 130° .
Jason considered two similar televisions at a local electronics store. the cheaper version was 12 inches by 24 inches. the more expensive version was \large \frac{8}{3} the size of the cheaper one. what are the dimensions of the expensive television? a 4.5 inches by 9 inches b 28 inches by 56 inches c 7.5 inches by 15 inches d 32 inches by 64 inches
The dimensions of expensive television is 32 inches through 64 inches.
This trouble may be solved if we understand the idea of fraction and a way to calculate the part of a fragment.
right here it is for the reason that the inexpensive tv is 12 inches by means of 24 inches.
Also it is given that the expensive television is \(\frac{8}{3}\) of the cheaper one.
Now taking the length into consideration the length of the television is
=\(\frac{8}{3}*12\)
= 32 inches
Now taking the width into consideration the width of the television is
=\(\frac{8}{3}*24\)
= 64 inches
So, the dimension of the expensive television is 32 inches by 64 inches.
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what is the solution to from the boat of a lake ,the angle of elevation to the cliff is 24.22,if the base of the cliff is 747 feet from the boat ,how high is the cliff to the nearest
Answer:
Step-by-step explanation:
338.33 ft
In the diagram below, what is the measure of ∠x?
Answer:<x=105
Step-by-step explanation:
180-75=105
Use a net to find the surface area of the right triangular prism shown below (Please show how you worked it) :
104 square feet
412 square feet
468 square feet
504 square feet
Answer:
468 square feet; Option C
Step-by-step explanation:
We can see that the base of this triangular prism has dimensions 15 feet by 10 feet, so for starters let us compute the area of this base:
Area ⇒ 15 * 10 = 150 ft^2
Now the rectangular surface next to this base, has dimensions 9 feet by 10 feet, provided that 9 feet is a uniform height of the triangular prism:
Area ⇒ 9 * 10 = 90 ft^2
This third rectangle is provided with one dimensions, of 10 feet. If we were to imagine what part of the 3-d shape is is, it would in fact be the slanted top. To find the second dimension, you would imagine it to be 12 feet. Using that, the area of this rectangle is thus ⇒ 10 * 12 = 120 ft^2
Now the two triangles at the corners each have an area of ⇒ 1/2 * base * height = 1/2 * 12 * 9 = 6 * 9 = 54 ft^2, so they have a total area of ⇒ 108 ft^2
This means the surface area of the right, triangular prism is:
150 + 90 + 120 + 108 = Answer: 468 square feet
20 POINTS!!!!!
which phrase best describes the expression : 3x + 4y + 1/2z
a. product of three variables
b. value of three coefficients
c. the quotient of three terms
d. the sum of three terms
What are the steps I have to do in order to get the solution
we have the expression
\(g(x)=\frac{x^2+1}{f(x)}\)Find out the derivative g'(x)
so
\(g^{\prime}(x)=\frac{(2x)(f(x)-(x^2+1)\cdot f^{\prime}(x)}{(f(x))^2}\)Looking at the graph
f(2)=3
Find out the value of f'(x) at x=2
Find out the slope of f(x) between interval (0,3)
we have the points (0,-5) and (3,7)
m=(7+5)/(3-0)
m=12/3
m=4
so
f'(2)=4
substitute the given values in the expression above
\(g^{\prime}(2)=\frac{(2\cdot2)(3)-(2^2+1)\cdot4}{(3)^2}\)\(g^{\prime}(2)=\frac{(4)(3)-(5)\cdot4}{9}\)\(g^{\prime}(2)=-\frac{8}{9}\)therefore
the answer is option ASolve the quadratic equation by completing the square.
x²–2x-12=0
Answer:
\((x-1)^2-13=0\)
\(x = \sqrt{13}+1\)
Step-by-step explanation:
Completing the square is a method of rewriting a quadratic equation in the standard form such that it is in vertex form. The first step is to group the linear and quadratic terms, then factor out the coefficient of the quadratic term. After doing so, complete the square, add a value such that the linear and quadratic terms form a perfect square trinomial. Do not forget to balance the equation. The final step is to simplify.
\(x^2-2x-12=0\)
Group,
\((x^2-2x)-12=0\)
Complete the square,
\((x^2-2x+1)-12-1=0\)
Simplify,
\((x-1)^2-13=0\)
Now solve the equation using inverse operations,
\((x-1)^2-13=0\\\\(x-1)^2=13\\\\x-1=\sqrt{13}\\\\x = \sqrt{13}+1\)
I need to know this question ASAP
Answer:
SAS
Step-by-step explanation:
Connie is buying snacks for a hike. She purchased a bag of trail mix for $6.98 and a large bottle of water for $2.15.
What was Connie's total bill?
Connie's total bill is sum of trail mix and water will be $9.13.
What is sum ?
In mathematics, the sum refers to the result of adding two or more numbers together. It is a basic arithmetic operation, often used in many different mathematical concepts and calculations. The symbol for addition is '+', and the sum of a set of numbers is often represented using the capital Greek letter sigma (∑).
According to the question:
Connie's total bill would be the sum of the cost of the trail mix and the cost of the water, which is:
Total bill = cost of trail mix + cost of water
Total bill = $6.98 + $2.15
Total bill = $9.13
Therefore, Connie's total bill was $9.13.
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Find the slope of the line.
y = 3/4x + 207
How do I determine whether a graph is a function?
Here's a more detailed explanation: To determine if a graph is a function, you can use the vertical line test. The vertical line test states that if you can draw a vertical line that intersects the graph in more than one place, then the graph is not a function.
Determining whether a graph represents a function is an important concept in mathematics, especially in algebra and calculus. A function is a set of ordered pairs where each input is associated with exactly one output.
So, if you take a ruler or a straight edge and place it vertically on the graph, and it intersects the graph in two or more points, then the graph is not a function. This is because if two points in the graph have the same x-value, they must have different y-values, since functions can only have one output for each input.
On the other hand, if you place a vertical line anywhere on the graph and it intersects the graph in only one point, then the graph is a function.
It's also important to remember that a function must also pass the horizontal line test, which means that no horizontal line can intersect the graph in more than one place.
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Ye uhm help please :))))
Please help. Will give Brainliest!!
Answer:
we have
tan ø=perpendicular/base
tan30=3/y
y=3/tan30
y=3√3 is your answer
The fractuon 3/5 is found between which pair of fractions on a number line?
Answer: It's kinda simple, 2/5 and 4/5
Just add 1 to the numerator of the original fraction, and there's where you get 4/5. Then subtract 1 from the original fraction, and that's where you get 2/5!
Find the quartiles for these data values:
5,7,7,8,10,11,12,15,17
Answer:
The median {Q2} is 10
Q1 is 7+7/2 which is 7
Q3 is 15+12/2 which is 13.5
Step-by-step explanation:
Answer:
b
Step-by-step explanation:
its coreect
0.4(5x-15)=2.5(x+3) what is the value of x?
\(0,4(5x-15)=2,5(x+3)\\\\2x-6=2,5x+7,5\\\\2x-2,5x=7,5+6\\\\-0,5x=13,5 \ \ /\cdot(-2)\\\\\huge\boxed{x=-27}\)
Answer:
Answer:
x=−27
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
0.4(5x−15)=2.5(x+3)
(0.4)(5x)+(0.4)(−15)=(2.5)(x)+(2.5)(3)(Distribute)
2x+−6=2.5x+7.5
2x−6=2.5x+7.5
Step 2: Subtract 2.5x from both sides.
2x−6−2.5x=2.5x+7.5−2.5x
−0.5x−6=7.5
Step 3: Add 6 to both sides.
−0.5x−6+6=7.5+6
−0.5x=13.5
Step 4: Divide both sides by -0.5.
−0.5x
−0.5
=
13.5
−0.5
x=−27
Answer:
x=−27
a quadrilateral has 1 pair of equal sides what 2 shapes can it be
Answer: Square and rectangle
Step-by-step explanation:
You have a bag of poker chips, containing 2 white, 1 red, and 3 blue chips. White chips are worth $1, red chips are worth $3 and blue chips are worth $5. You need $7 worth of chips in order to see someone’s raise, so you take chips out of the bag one at a time, noting the color of each one as it’s removed, and stop when the total value of the chips removed is at least $7. How many sequences of chip colors are possible when you do this?
There are 144 possible sequences of chip colors.
How many sequences of chip colors are possibleWe can solve this problem by counting the number of possible sequences of chip colors that can be drawn from the bag until the total value of the chips is at least $7.
Let's consider all the possible sequences of chips that can be drawn from the bag. The first chip can be any of the 6 chips in the bag. For each chip color, there are different scenarios that can happen after drawing the first chip:
If the first chip is a white chip, then we need to draw chips worth $6 more in order to reach $7. We can draw any combination of the remaining 5 chips to get a total value of $6 or more. There are 2 white, 1 red, and 3 blue chips remaining, so there are 2^5 = 32 possible combinations.If the first chip is a red chip, then we need to draw chips worth $4 more in order to reach $7. We can draw any combination of the remaining 5 chips to get a total value of $4 or more. There are 2 white, 1 red, and 3 blue chips remaining, so there are 2^5 = 32 possible combinations.If the first chip is a blue chip, then we need to draw chips worth $2 more in order to reach $7. We can draw any combination of the remaining 5 chips to get a total value of $2 or more. There are 2 white, 1 red, and 2 blue chips remaining, so there are 2^4 = 16 possible combinations.Therefore, the total number of possible sequences of chip colors that can be drawn from the bag until the total value of the chips is at least $7 is: 2 x 32 + 1 x 32 + 3 x 16 = 144
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What is the answer to -2(-5)(-3).
Answer:
-30
Step-by-step explanation:
-5 x -3 = 15
15 x -2 = -30
Explanation:
A negative times a negative will always be a positive. Vice versa.
A positive times a negative will always be a negative. Vice versa.