Given the following data set: 4, 5, 3, 4, 7, 8, 9 (2 points)
Calculate the three "measures of variability". You must show all of your work to receive full credit. (copy and paste equations from the correct homework assignment to make this easy).

Answers

Answer 1

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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Related Questions

Evaluate the expression when x = 6 and y = -4. 6x - 5y​

Answers

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

Answers

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

Answers

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

Answers

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

Answers

\(\begin{gathered} k=\text{constant of proportionality} \\ k=\frac{2}{5} \\ k=0.4 \end{gathered}\)

Solve the system of equations -4x-y=18

Answers

Answer: Y=-4x-18
Explanation: You need to get y by itself so you will move -4x to the other side by adding it on both side so it can cancel out on the side that it was originally which was the y side.
This will give you -y=4x+18
Now you need to make y become a positive so you will divide both side by -1 ( the 1 comes from in front of the y there is always an invisible 1 if there is no number in front of the letter (x,y,etc))
When you divide everything by -1 it will get you : y=-4x-18

Helpppp meee pleaseee

Helpppp meee pleaseee
Helpppp meee pleaseee
Helpppp meee pleaseee
Helpppp meee pleaseee

Answers

The first triangle is equilateral.

This is shown because all of the angles are 60°. Another way to know this is because of the lines sticking out from all three sides, these lines indicate that the sides of the triangle are of equal length. Therefore, it is equilateral.


The second triangle is a right triangle. The bottom left angle has a square in it, this indicates a 90° angle. Therefore, it is a right triangle.


The third triangle is scalene. None of the sides are the same length, indicating a scalene triangle.


For question 11, x = 40

180 = x + 2x + (x + 20)

180 = 4x + 20

160 = 4x

40 = x


For 12, x = 12

90 = 3x + 10 + 3x + 8

90 = 6x + 18

72 = 6x

12 = x


The fourth triangle is acute because none of its angles are equal to or above 90°

The fifth triangle is equilateral because all of the angles are 60°


The sixth triangle is a right triangle cause it has the 90° square


For 7, x = 93

180 = x + 52 + 35

180 = x + 87

93 = x


For 8, x = 75

180 = 2x + 30

150 = 2x

75 = x


For 9, x = 23

90 = x + 2x + 21

90 = 3x + 21

69 = 3x

23 = x


For 10, x = 51

3x - 22 = 180 - z
80 + x + z = 180

3x + z - 22 = 180
80 + x + z = 180

3x + z = 202
x + z = 100

2x = 102

X = 51


Hope this helps!

Solve for b.
5 = b/2

Answers

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)?​

Answers

Can yu give more explanation

What’s it the slope of the line

Whats it the slope of the line

Answers

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

Please help me solve this

Answers

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

Answers

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

Answers

Answer:

Step-by-step explanation:

338.33 ft

In the diagram below, what is the measure of ∠x?

In the diagram below, what is the measure of x?

Answers

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

Use a net to find the surface area of the right triangular prism shown below (Please show how you worked

Answers

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

Answers

Maybe c not to sure hope this helps

What are the steps I have to do in order to get the solution

What are the steps I have to do in order to get the solution

Answers

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 A

Solve the quadratic equation by completing the square.
x²–2x-12=0


Solve the quadratic equation by completing the square.x2x-12=0

Answers

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

I need to know this question ASAP

Answers

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?

Answers

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

Answers

m = 3/4
Remeber y = mx + c

How do I determine whether a graph is a function?

Answers

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 :))))

Ye uhm help please :))))

Answers

The game would be $41.60
52*0.2=10.40
52-10.4=41.60
41.60*0.06=2.49
41.60+2.49=$44.09

Please help. Will give Brainliest!!

Please help. Will give Brainliest!!

Answers

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?

Answers

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

Answers

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?

Answers

\(0,4(5x-15)=2,5(x+3)\\\\2x-6=2,5x+7,5\\\\2x-2,5x=7,5+6\\\\-0,5x=13,5 \ \ /\cdot(-2)\\\\\huge\boxed{x=-27}\)

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

Answers

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?

Answers

There are 144 possible sequences of chip colors.

How many sequences of chip colors are possible

We 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).

Answers

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.

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