Question 1

Find the population variance for the following data set: 26 28 16 23 20

Accepted Answer

A)  18.2 
B)  22.8 
C)  12 
D)  4.8 
A)  18.2 
B)  22.8 
C)  12 
D)  4.8

Question 2

A recent survey of a new diet cola reported the following percentages of people who likec taste. Find the weighted mean of the percentages.
$\begin{array} { c c c } \text { Area } & \text { \% Favored } & \text { Number surveyed } \ 1 & 30 & 2500 \ 2 & 25 & 1500 \ 3 & 50 & 3000 \end{array}$ d the

Accepted Answer

A)  25 
B)  35 
C)  36 
D)  38 
A)  25 
B)  35 
C)  36 
D)  38

Question 3

The average weight of adult male bison in a particular federal wildlife preserve is 1450 pounds with a standard deviation of 240 pounds. Find the weight of an adult bull whose $z$-score is $1.5$.

Accepted Answer

A)  1090 lb 
B)  1450 lb 
C)  1690 lb 
D)  1810 lb 
A)  1090 lb 
B)  1450 lb 
C)  1690 lb 
D)  1810 lb

Question 4

The size of the box in a boxplot shows the of the data set.

Accepted Answer

A)  interquartile range 
B)  difference between the mean and the median 
C)  variance 
D)  skewness 
A)  interquartile range 
B)  difference between the mean and the median 
C)  variance 
D)  skewness

Question 5

The average resident of Metro City produces 570 pounds of solid waste each year, and the standard deviation is approximately 70 pounds. Use Chebyshev's theorem to find the
Weight range that contains at least 75% of all residents' annual garbage weights.

Accepted Answer

A)  Between 360 and 780 pounds 
B)  Between 430 and 710 pounds 
C)  Between 500 and 640 pounds 
D)  Between 290 and 850 pounds 
A)  Between 360 and 780 pounds 
B)  Between 430 and 710 pounds 
C)  Between 500 and 640 pounds 
D)  Between 290 and 850 pounds

Question 6

The range of a data set is the difference between the highest value and the lowest value.

Accepted Answer

A) True 
 B)False

Question 7

$$\begin{array}{l}
\text { Approximate the sample standard deviation given the following frequency distribution. }\
\begin{array} { c c } 
\hline \text { Class } & \text { Frequency } \
\hline 0 - 14 & 11 \
15 - 29 & 8 \
30 - 44 & 10 \
45 - 59 & 9 \
60 - 74 & 14 \
\hline
\end{array}
\end{array}$$

Accepted Answer

A)  502.2 
B)  22.6 
C)  22.4 
D)  512.0 
A)  502.2 
B)  22.6 
C)  22.4 
D)  512.0

Question 8

The average age of Stokes County school board members over the last 40 years has been 46, but members have ranged from 29 to 67. Use the range rule of thumb to estimate the
Standard deviation of the members' ages.

Accepted Answer

A)  9.5 
B)  24 
C)  47.3 
D)  19 
A)  9.5 
B)  24 
C)  47.3 
D)  19

Question 9

If a student scored 76 points on a test where the mean score was $82.5$ and the standard deviation was 6.1. The student's $z$ score is________

Accepted Answer

A)  -1.07 
B)  -0.17 
C)  13.52 
D)  0.17 
A)  -1.07 
B)  -0.17 
C)  13.52 
D)  0.17

Question 10

Gina and Stewart are surf-fishing on the Atlantic coast, where both bluefish and pompano are common catches. The mean length of a bluefish is 264 millimeters with a standard deviation of $41 \mathrm {~mm}$. For pompano, the mean is $146 \mathrm {~mm}$ with a standard deviation of $24 \mathrm {~mm}$.
Stewart caught a bluefish that was $355 \mathrm {~mm}$ long. What was the $z$-score for this length?

Accepted Answer

A)  8.66 
B)  355 
C)  8.71 
D)  2.22 
A)  8.66 
B)  355 
C)  8.71 
D)  2.22

Question 11

Determine the range for the following data set. 6, 19, 10, 8, 26

Accepted Answer

A)  10 
B)  20 
C)  26 
D)  6 
A)  10 
B)  20 
C)  26 
D)  6

Question 12

The interquartile range IQR is found by subtracting the mean from the maximum value
of a data set.

Accepted Answer

A) True 
 B)False

Question 13

The following population parameters were obtained from a graphing calculator.

Assuming the population is bell-shaped, between what two values will approximately population be?

Accepted Answer

A)  63 to 96 
B)  41 to 85 
C)  52 to 74 
D)  30 to 96 
A)  63 to 96 
B)  41 to 85 
C)  52 to 74 
D)  30 to 96

Question 14

A is the midpoint in a data array.

Accepted Answer

The answer of A is the midpoint in a data...

Question 15

Given that the mean of a set of data is 25 and the standard deviation is 3, what is the coefficient of variation?

Accepted Answer

A)  833% 
B)  12% 
C)  8.33 
D)  0.12 
A)  833% 
B)  12% 
C)  8.33 
D)  0.12

Question 16

The is the average of the squares of the distance each value is
from the mean.

Accepted Answer

The answer of The is the average of the squares...

Question 17

Which plot below has a five-number summary of $5,6,11,12,13$ and an interquartile range of 5 ?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
A) 
  
B) 
  
C) 
  
D)

Question 18

According to Chebyshev's theorem, the maximum proportion of data values from a data set that are more than 1.5 standard deviations from the mean is .

Accepted Answer

A)  0.17 
B)  0.67 
C)  1.33 
D)  0.44 
A)  0.17 
B)  0.67 
C)  1.33 
D)  0.44

Question 19

What is the mean of the following data set? 4, 8, 11, 12, 13

Accepted Answer

A)  11.0 
B)  14.4 
C)  7.0 
D)  9.6 
A)  11.0 
B)  14.4 
C)  7.0 
D)  9.6

Question 20

The grades for the trigonometry exam are listed below. Find the range. 85, 76, 93, 82, 84, 90, 75

Accepted Answer

A)  76 
B)  11 
C)  18 
D)  9 
A)  76 
B)  11 
C)  18 
D)  9

Find the population variance for the following data set: 26 28 16 23 20

A recent survey of a new diet cola reported the following percentages of people who likec taste. Find the weighted mean of the percentages. Area \% Favored Number surveyed 1 30 2500 2 25 1500 3 50 3000 d the

The average weight of adult male bison in a particular federal wildlife preserve is 1450 pounds with a standard deviation of 240 pounds. Find the weight of an adult bull whose $z$ -score is $1.5$ .

The size of the box in a boxplot shows the of the data set.

The average resident of Metro City produces 570 pounds of solid waste each year, and the standard deviation is approximately 70 pounds. Use Chebyshev's theorem to find the Weight range that contains at least 75% of all residents' annual garbage weights.

The range of a data set is the difference between the highest value and the lowest value.

Approximate the sample standard deviation given the following frequency distribution. Class Frequency 0-14 11 15-29 8 30-44 10 45-59 9 60-74 14

The average age of Stokes County school board members over the last 40 years has been 46, but members have ranged from 29 to 67. Use the range rule of thumb to estimate the Standard deviation of the members' ages.

If a student scored 76 points on a test where the mean score was $82.5$ and the standard deviation was 6.1. The student's $z$ score is________

Determine the range for the following data set. 6, 19, 10, 8, 26

The interquartile range IQR is found by subtracting the mean from the maximum value of a data set.

The following population parameters were obtained from a graphing calculator. Assuming the population is bell-shaped, between what two values will approximately population be?

A is the midpoint in a data array.

Given that the mean of a set of data is 25 and the standard deviation is 3, what is the coefficient of variation?

The is the average of the squares of the distance each value is from the mean.

Which plot below has a five-number summary of $5,6,11,12,13$ and an interquartile range of 5 ?

According to Chebyshev's theorem, the maximum proportion of data values from a data set that are more than 1.5 standard deviations from the mean is .

What is the mean of the following data set? 4, 8, 11, 12, 13

The grades for the trigonometry exam are listed below. Find the range. 85, 76, 93, 82, 84, 90, 75

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Correlation and Regression

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters

Exam 3: Data Description

Find the population variance for the following data set: 26 28 16 23 20

A recent survey of a new diet cola reported the following percentages of people who likec taste. Find the weighted mean of the percentages. Area \% Favored Number surveyed 1 30 2500 2 25 1500 3 50 3000 d the

The average weight of adult male bison in a particular federal wildlife preserve is 1450 pounds with a standard deviation of 240 pounds. Find the weight of an adult bull whose zzz -score is 1.51.51.5 .

The size of the box in a boxplot shows the of the data set.

The average resident of Metro City produces 570 pounds of solid waste each year, and the standard deviation is approximately 70 pounds. Use Chebyshev's theorem to find the Weight range that contains at least 75% of all residents' annual garbage weights.

The range of a data set is the difference between the highest value and the lowest value.

Approximate the sample standard deviation given the following frequency distribution. Class Frequency 0-14 11 15-29 8 30-44 10 45-59 9 60-74 14

The average age of Stokes County school board members over the last 40 years has been 46, but members have ranged from 29 to 67. Use the range rule of thumb to estimate the Standard deviation of the members' ages.

If a student scored 76 points on a test where the mean score was 82.582.582.5 and the standard deviation was 6.1. The student's zzz score is________

Determine the range for the following data set. 6, 19, 10, 8, 26

The interquartile range IQR is found by subtracting the mean from the maximum value of a data set.

The following population parameters were obtained from a graphing calculator. Assuming the population is bell-shaped, between what two values will approximately population be?

A is the midpoint in a data array.

Given that the mean of a set of data is 25 and the standard deviation is 3, what is the coefficient of variation?

The is the average of the squares of the distance each value is from the mean.

Which plot below has a five-number summary of 5,6,11,12,135,6,11,12,135,6,11,12,13 and an interquartile range of 5 ?

According to Chebyshev's theorem, the maximum proportion of data values from a data set that are more than 1.5 standard deviations from the mean is .

What is the mean of the following data set? 4, 8, 11, 12, 13

The grades for the trigonometry exam are listed below. Find the range. 85, 76, 93, 82, 84, 90, 75

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Correlation and Regression

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters

The average weight of adult male bison in a particular federal wildlife preserve is 1450 pounds with a standard deviation of 240 pounds. Find the weight of an adult bull whose $z$ -score is $1.5$ .

If a student scored 76 points on a test where the mean score was $82.5$ and the standard deviation was 6.1. The student's $z$ score is________

Which plot below has a five-number summary of $5,6,11,12,13$ and an interquartile range of 5 ?