Question 1

Find $Q _ { 1 } , Q _ { 2 }$, and $Q _ { 3 }$ for the ages of nine students.
$\begin{array} { l l l l l l l l l } 18 & 20 & 21 & 19 & 17 & 36 & 22 & 19 & 24 \end{array}$

Accepted Answer

The answer of Find \(Q _ { 1 } ,...

Question 2

$$\begin{array}{l}
\text { Use the equation of the regression line to predict } y \text { when } x = 20 \text {. }\
\begin{array} { c | c c c c c } 
x & 2 & 4 & 3 & 5 & 1 \
\hline y & 20 & 31 & 25 & 32 & 13
\end{array}
\end{array}$$

Accepted Answer

A)  111.1 
B)  109.9 
C)  107.5 
D)  105.6 
A)  111.1 
B)  109.9 
C)  107.5 
D)  105.6

Question 3

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram for the data.
$\begin{array}{l|c}
\text { Class limits } & \text { Frequency } \
\hline 0-4 & 3 \
5-9 & 4 \
10-14 & 8 \
15-19 & 2 \
20-24 & 5 \
25-29 & 3
\end{array}$

Accepted Answer

The answer of The frequency distribution below was obtained by...

Question 4

A data set of size 22 has correlation coefficient of r = -0.461. Test the significance of r at the 5% level and at the 1% level.

Accepted Answer

A)  r is not significant at 5% or at 1%. 
B)  r is significant at 5% and at 1%. 
C)  r is significant at 5%, but not at 1%. 
A)  r is not significant at 5% or at 1%. 
B)  r is significant at 5% and at 1%. 
C)  r is significant at 5%, but not at 1%.

Question 5

$$\begin{array}{l}
\text { These data represent the grades on a college exam. Find the mean }\
\begin{array} { l | r } 
\text { Class limits } & \text { Frequency } \
\hline 50 - 59 & 5 \
60 - 69 & 8 \
70 - 79 & 19 \
80 - 89 & 16 \
90 - 99 & 10
\end{array}
\end{array}$$

Accepted Answer

The answer of \[\begin{array}{l}
\text { These data represent the grades...

Question 6

Find the area under the normal distribution curve to the left of z = -1.50.

Accepted Answer

The answer of Find the area under the normal distribution...

Question 7

A bookstore recorded the type of books 30 customers purchased during a weekenc sale $( \mathrm { R } =$ romance novel, $\mathrm { S } =$ science fiction, $\mathrm { N } =$ nonfiction, $\mathrm { C } =$ children's fiction). Construct a frequency distribution for the data.
$\begin{array} { l c c c c c } \mathrm { N } & \mathrm { R } & \mathrm { R } & \mathrm { C } & \mathrm { R } & \mathrm { S } \ \mathrm { R } & \mathrm { C } & \mathrm { C } & \mathrm { S } & \mathrm { R } & \mathrm { R } \ \mathrm { C } & \mathrm { N } & \mathrm { N } & \mathrm { R } & \mathrm { C } & \mathrm { S } \ \mathrm { S } & \mathrm { S } & \mathrm { R } & \mathrm { R } & \mathrm { N } & \mathrm { C } \ \mathrm { S } & \mathrm { R } & \mathrm { R } & \mathrm { C } & \mathrm { C } & \mathrm { N } \end{array}$

Accepted Answer

The answer of A bookstore recorded the type of books...

Question 8

A small company did a poll of how their employees commuted to work. Use the data to draw a pie chart.
$\begin{array}{l|c}
\text { Method of commute } & \text { Number } \
\hline \text { Car } & 15 \
\text { Bus } & 11 \
\text { Train } & 8 \
\text { Bike } & 2 \
\text { Walk } & 4
\end{array}$

Accepted Answer

The answer of A small company did a poll of...

Question 9

The average selling price of homes in a certain city is $125,400. Assume the variable is normally distributed with a standard deviation of $62,700. If 151 homes are for sale, how many homes will sell for more than $97,185?

Accepted Answer

The answer of The average selling price of homes in...

Question 10

A small company did a poll of how their employees commuted to work. Use the data to draw a bar graph.
$\begin{array}{l|c}
\text { Method of commute } & \text { Number } \
\hline \text { Car } & 15 \
\text { Bus } & 11 \
\text { Train } & 8 \
\text { Bike } & 2 \
\text { Walk } & 4
\end{array}$

Accepted Answer

The answer of A small company did a poll of...

Question 11

Find the range. 7 40 6 45 26 4 28 46

Accepted Answer

The answer of Find the range. 7 40 6 45...

Question 12

$$\begin{array}{l}
\text { Use the equation of the regression line to predict } y \text { when } x = 20 \text {. }\
\begin{array} { c | c c c c c c } 
x & 5 & 8 & 6 & 10 & 12 & 9 \
\hline y & 18 & 20 & 15 & 25 & 30 & 25
\end{array}
\end{array}$$

Accepted Answer

A)  50 
B)  40 
C)  45.5 
D)  48.5 
A)  50 
B)  40 
C)  45.5 
D)  48.5

Question 13

To obtain the frequency distribution below, twenty-three babies were monitored for how many times they cried during the night. Construct a histogram and frequency polygon for the data.
$\begin{array}{l|c}
\text { Class } & \text { Frequency } \
\hline 0-2 & 4 \
3-5 & 6 \
6-8 & 9 \
9-11 & 3 \
12-14 & 1
\end{array}$

Accepted Answer

The answer of To obtain the frequency distribution below, twenty-three...

Question 14

$$\begin{array}{l}
\text { Find the value for the correlation coefficient } r \text {. }\
\begin{array} { l | l l l l l } 
x & 21 & 30 & 25 & 24 & 29 \
\hline y & 50 & 44 & 45 & 37 & 30
\end{array}
\end{array}$$

Accepted Answer

The answer of \[\begin{array}{l}
\text { Find the value for the...

Question 15

For the following data (a) Draw a scatter plot. (b) Find the value for r. (c) Test the significance of r at the 5% level and at the 1% level. (d) If r is significant, find the regression line and draw the line on the scatter plot. (e) Describe the nature of the relationship if one exists. (f) Predict y when x = 20. $$\begin{array} { c | c c c c c c c } 
x & 4 & 1 & 3 & 2 & 5 & 7 & 6 \
\hline y & 14 & 6 & 9 & 9 & 17 & 20 & 16
\end{array}$$

Accepted Answer

The answer of For the following data (a) Draw a...

Question 16

Kate scored in the 35th percentile rank on an exam. If 200 students took the exam, how many students scored lower than Kate?

Accepted Answer

A)  70 
B)  69 
C)  71 
D)  68 
A)  70 
B)  69 
C)  71 
D)  68

Question 17

The average amount customers at a certain grocery store spend yearly is $813.71. Assume the variable is normally distributed. If the standard deviation is $71.37, find the probability that a randomly selected customer spends between $638.85 and $942.18.

Accepted Answer

A)  -0.029 = -2.9% 
B)  1.080 = 108.0% 
C)  -0.041 = -4.1% 
D)  0.957 = 95.7% 
A)  -0.029 = -2.9% 
B)  1.080 = 108.0% 
C)  -0.041 = -4.1% 
D)  0.957 = 95.7%

Question 18

$$\begin{array}{l}
\text { Construct a pie chart for the number of stray animals in a certain city. }\
\begin{array} { l | c } 
\text { Animal } & \text { Number of strays } \
\hline \text { Cats } & 723 \
\text { Dogs } & 576 \
\text { Rabbits } & 328 \
\text { Lizards } & 491
\end{array}
\end{array}$$

Accepted Answer

The answer of \[\begin{array}{l}
\text { Construct a pie chart for...

Question 19

$$\begin{array}{l}
\text { Find the value for } r \text { and test the significance of } r \text { at the } 5 \% \text { level and at the } 1 \% \text { level. }\
\begin{array} { c | c c c c } 
x & 21 & 14 & 18 & 23 \
\hline y & 9 & 1 & 5 & 11
\end{array}
\end{array}$$

Accepted Answer

A)  r = 0.998. r is significant at the 5% level, but not at the 1% level 
B)  r = 0.998. r is significant at the 5% level and the 1% level 
C)  r = 0.995. r is significant not significant at the 5% level or the 1% level 
D)  r = 0.995. r is significant at the 5% level, but not at the 1% level 
A)  r = 0.998. r is significant at the 5% level, but not at the 1% level 
B)  r = 0.998. r is significant at the 5% level and the 1% level 
C)  r = 0.995. r is significant not significant at the 5% level or the 1% level 
D)  r = 0.995. r is significant at the 5% level, but not at the 1% level

Question 20

Find the area under the normal distribution curve to the left of z = 0.55.

Accepted Answer

A)  0.291 
B)  0.709 
C)  0.209 
D)  -0.209 
A)  0.291 
B)  0.709 
C)  0.209 
D)  -0.209

Find $Q _ { 1 } , Q _ { 2 }$ , and $Q _ { 3 }$ for the ages of nine students. 18 20 21 19 17 36 22 19 24

Use the equation of the regression line to predict y when x=20 . x 2 4 3 5 1 y 20 31 25 32 13

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram for the data. Class limits Frequency 0-4 3 5-9 4 10-14 8 15-19 2 20-24 5 25-29 3

A data set of size 22 has correlation coefficient of r = -0.461. Test the significance of r at the 5% level and at the 1% level.

These data represent the grades on a college exam. Find the mean Class limits Frequency 50-59 5 60-69 8 70-79 19 80-89 16 90-99 10

Find the area under the normal distribution curve to the left of z = -1.50.

A bookstore recorded the type of books 30 customers purchased during a weekenc sale $( \mathrm { R } =$ romance novel, $\mathrm { S } =$ science fiction, $\mathrm { N } =$ nonfiction, $\mathrm { C } =$ children's fiction). Construct a frequency distribution for the data.

A small company did a poll of how their employees commuted to work. Use the data to draw a pie chart. Method of commute Number Car 15 Bus 11 Train 8 Bike 2 Walk 4

The average selling price of homes in a certain city is $125,400. Assume the variable is normally distributed with a standard deviation of $62,700. If 151 homes are for sale, how many homes will sell for more than $97,185?

A small company did a poll of how their employees commuted to work. Use the data to draw a bar graph. Method of commute Number Car 15 Bus 11 Train 8 Bike 2 Walk 4

Find the range. 7 40 6 45 26 4 28 46

Use the equation of the regression line to predict y when x=20 . x 5 8 6 10 12 9 y 18 20 15 25 30 25

To obtain the frequency distribution below, twenty-three babies were monitored for how many times they cried during the night. Construct a histogram and frequency polygon for the data. Class Frequency 0-2 4 3-5 6 6-8 9 9-11 3 12-14 1

Find the value for the correlation coefficient r . x 21 30 25 24 29 y 50 44 45 37 30

Kate scored in the 35th percentile rank on an exam. If 200 students took the exam, how many students scored lower than Kate?

The average amount customers at a certain grocery store spend yearly is $813.71. Assume the variable is normally distributed. If the standard deviation is $71.37, find the probability that a randomly selected customer spends between $638.85 and $942.18.

Construct a pie chart for the number of stray animals in a certain city. Animal Number of strays Cats 723 Dogs 576 Rabbits 328 Lizards 491

Find the value for r and test the significance of r at the 5\% level and at the 1\% level. x 21 14 18 23 y 9 1 5 11

Find the area under the normal distribution curve to the left of z = 0.55.

Problem Solving

Set

Logic

Numeration Systems

The Real Number System

Topics in Algebra

Consumer Mathematics

Measurement

Geometry

Probability and Counting Techniques

Statistics

Graph Theory

Available Online: Other Mathematical Systems

Summary

Filters

Exam 12: Voting Methods

Find Q1,Q2Q _ { 1 } , Q _ { 2 }Q1​,Q2​ , and Q3Q _ { 3 }Q3​ for the ages of nine students. 18 20 21 19 17 36 22 19 24

Use the equation of the regression line to predict y when x=20 . x 2 4 3 5 1 y 20 31 25 32 13

The frequency distribution below was obtained by monitoring the number of vacation days per year taken by twenty-five employees. Construct a histogram for the data. Class limits Frequency 0-4 3 5-9 4 10-14 8 15-19 2 20-24 5 25-29 3

A data set of size 22 has correlation coefficient of r = -0.461. Test the significance of r at the 5% level and at the 1% level.

These data represent the grades on a college exam. Find the mean Class limits Frequency 50-59 5 60-69 8 70-79 19 80-89 16 90-99 10

Find the area under the normal distribution curve to the left of z = -1.50.

A bookstore recorded the type of books 30 customers purchased during a weekenc sale (R=( \mathrm { R } =(R= romance novel, S=\mathrm { S } =S= science fiction, N=\mathrm { N } =N= nonfiction, C=\mathrm { C } =C= children's fiction). Construct a frequency distribution for the data.

A small company did a poll of how their employees commuted to work. Use the data to draw a pie chart. Method of commute Number Car 15 Bus 11 Train 8 Bike 2 Walk 4

The average selling price of homes in a certain city is $125,400. Assume the variable is normally distributed with a standard deviation of $62,700. If 151 homes are for sale, how many homes will sell for more than $97,185?

A small company did a poll of how their employees commuted to work. Use the data to draw a bar graph. Method of commute Number Car 15 Bus 11 Train 8 Bike 2 Walk 4

Find the range. 7 40 6 45 26 4 28 46

Use the equation of the regression line to predict y when x=20 . x 5 8 6 10 12 9 y 18 20 15 25 30 25

To obtain the frequency distribution below, twenty-three babies were monitored for how many times they cried during the night. Construct a histogram and frequency polygon for the data. Class Frequency 0-2 4 3-5 6 6-8 9 9-11 3 12-14 1

Find the value for the correlation coefficient r . x 21 30 25 24 29 y 50 44 45 37 30

Kate scored in the 35th percentile rank on an exam. If 200 students took the exam, how many students scored lower than Kate?

The average amount customers at a certain grocery store spend yearly is $813.71. Assume the variable is normally distributed. If the standard deviation is $71.37, find the probability that a randomly selected customer spends between $638.85 and $942.18.

Construct a pie chart for the number of stray animals in a certain city. Animal Number of strays Cats 723 Dogs 576 Rabbits 328 Lizards 491

Find the value for r and test the significance of r at the 5\% level and at the 1\% level. x 21 14 18 23 y 9 1 5 11

Find the area under the normal distribution curve to the left of z = 0.55.

Problem Solving

Set

Logic

Numeration Systems

The Real Number System

Topics in Algebra

Consumer Mathematics

Measurement

Geometry

Probability and Counting Techniques

Statistics

Graph Theory

Available Online: Other Mathematical Systems

Summary

Filters

Find $Q _ { 1 } , Q _ { 2 }$ , and $Q _ { 3 }$ for the ages of nine students. 18 20 21 19 17 36 22 19 24

A bookstore recorded the type of books 30 customers purchased during a weekenc sale $( \mathrm { R } =$ romance novel, $\mathrm { S } =$ science fiction, $\mathrm { N } =$ nonfiction, $\mathrm { C } =$ children's fiction). Construct a frequency distribution for the data.