Question 1

A data set has a mean of 177 and a standard deviation of 20. Compute the coefficient of variation.

Accepted Answer

A)  20.00 
B)  0.11 
C)  2.26 
D)  9.09 
A)  20.00 
B)  0.11 
C)  2.26 
D)  9.09

Question 2

Find the mean of the following data set? 10, 5, 8, 3, 14

Accepted Answer

A)  7.0 
B)  9.0 
C)  5.0 
D)  8.0 
A)  7.0 
B)  9.0 
C)  5.0 
D)  8.0

Question 3

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 288 millimeters with a
Standard deviation of 63 mm. For pompano, the mean is 128 mm with a standard
Deviation of 31 mm.
Stewart caught a bluefish that was 307 mm long, and Gina caught a pompano that was
189 mm long. Who caught the longer fish, relative to fish of the same species?

Accepted Answer

A)  Neither. Relative to its respective species, the fish are the same length. 
B)  Gina 
C)  Stewart 
A)  Neither. Relative to its respective species, the fish are the same length. 
B)  Gina 
C)  Stewart

Question 4

A random sample of weights (in carats) of sapphires in a jeweler's collection is shown. Fi the mean of the sample.
$\begin{array} { c c } \text { Class Boundaries } & \text { Frequency } \ 0.95 - 2.95 & 10 \ 2.95 - 4.95 & 15 \ 4.95 - 6.95 & 10 \ 6.95 - 8.95 & 10 \ 8.95 - 10.95 & 9 \end{array}$

Accepted Answer

A)  10.80 
B)  5.55 
C)  5.95 
D)  5.69 
A)  10.80 
B)  5.55 
C)  5.95 
D)  5.69

Question 5

What is the range of the set of values 5, 8, 3, 9, and 17.

Accepted Answer

A)  20 
B)  8 
C)  14 
D)  5 
A)  20 
B)  8 
C)  14 
D)  5

Question 6

The data shown represents the high scores for members of a bowling league over a particular season. Find the approximate percentile rank of a score of 265 by constructing ; percentile graph.
$\begin{array} { c c } \text { Score } & \text { Frequency } \ 249.5 - 254.5 & 3 \ 254.5 - 259.5 & 14 \ 259.5 - 264.5 & 19 \ 264.5 - 269.5 & 12 \ 269.5 - 274.5 & 3 \end{array}$

Accepted Answer

A)  63 
B)  60 
C)  73 
D)  69 
A)  63 
B)  60 
C)  73 
D)  69

Question 7

Find the mean for the following data set: 28 25 23 34 14 14

Accepted Answer

A)  20 
B)  24 
C)  23.0 
D)  14 
A)  20 
B)  24 
C)  23.0 
D)  14

Question 8

Find the sample standard deviation for the following data set: 25 13 31 33 20

Accepted Answer

A)  53.4 
B)  66.8 
C)  7.3 
D)  8.2 
A)  53.4 
B)  66.8 
C)  7.3 
D)  8.2

Question 9

Identify the five-number summary of the following data set. 7, 11, 21, 28, 32, 33, 37, 43.

Accepted Answer

A)  7, 21, 26.5, 33, 43 
B)  7, 16, 30, 35, 43 
C)  7, 11, 28, 33, 43 
D)  7, 21, 30, 33, 43 
A)  7, 21, 26.5, 33, 43 
B)  7, 16, 30, 35, 43 
C)  7, 11, 28, 33, 43 
D)  7, 21, 30, 33, 43

Question 10

A five-number summary of a data set consists of the minimum, $Q _ { 1 }$, the median, $Q _ { 3 }$, and the maximum.

Accepted Answer

A) True 
 B)False

Question 11

Make a boxplot for the following data set.
24, 15, 34, 92, 68, 34, 78, 45, 53, 67, 83, 46

Accepted Answer

The answer of Make a boxplot for the following data...

Question 12

The number of police officers in selected city districts is listed below. Find the mode. 24, 26, 24, 30, 23, 28, 19, 31, 24, 26, 19

Accepted Answer

A)  28 
B)  24 
C)  26 
D)  23 
A)  28 
B)  24 
C)  26 
D)  23

Question 13

A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 hours with a standard deviation of 0.1 hours.
The lifetimes are approximately bell-shaped. Estimate the number of batteries with
Lifetimes between 3.0 hours and 3.4 hours.

Accepted Answer

A)  almost all (greater than 229) 
B)  164 
C)  12 
D)  229 
A)  almost all (greater than 229) 
B)  164 
C)  12 
D)  229

Question 14

Following are heights, in inches, for a sample of college basketball players.
$\begin{array}{llllllllll}
\hline 84 & 88 & 86 & 85 & 70 & 75 & 72 & 86 & 78 & 81 \
\hline 86 & 78 & 81 & 72 & 73 & 76 & 77 & 87 & 88 & 84 \
\hline
\end{array}$

Find the sample standard deviation for the heights of the basketball players.

Accepted Answer

A)  6 
B)  18 
C)  80.4 
D)  5.8 
A)  6 
B)  18 
C)  80.4 
D)  5.8

Question 15

$$\begin{array}{l}
\text { For the data set below, find the upper outlier boundary. }\
\begin{array} { l l l l l l l l l l l } 
\hline 154 & 160 & 146 & 146 & 131 & 148 & 164 & 199 & 169 & 139 & 165 \
\hline
\end{array}
\end{array}$$

Accepted Answer

A)  19 
B)  193.5 
C)  165 
D)  199 
A)  19 
B)  193.5 
C)  165 
D)  199

Question 16

Chebyshev's theorem can be used to find the minimum percentage of the values in a data
set that will fall within a certain distance of the mean.

Accepted Answer

A) True 
 B)False

Question 17

A population has a mean $\mu = 23$ and standard deviation $\sigma = 10$. What number has a $z$-score of $2.5 ?$

Accepted Answer

A)  25 
B)  2 
C)  -2 
D)  48 
A)  25 
B)  2 
C)  -2 
D)  48

Question 18

The percentile corresponding to a given data value $X$ is computed by adding the $0.5$ to number of values less than $X$ then dividing by the total number of values in the data set.

Accepted Answer

A) True 
 B)False

Question 19

A student has an average of 78 on seven chapter tests. If the student's scores on six of the tests are 72, 82, 84, 66, 68, and 89, what was the score on the remaining test?

Accepted Answer

A)  85 
B)  78 
C)  96 
D)  77 
A)  85 
B)  78 
C)  96 
D)  77

Question 20

The is the mode for grouped data.

Accepted Answer

The answer of The is the mode for grouped data....

A data set has a mean of 177 and a standard deviation of 20. Compute the coefficient of variation.

Find the mean of the following data set? 10, 5, 8, 3, 14

A random sample of weights (in carats) of sapphires in a jeweler's collection is shown. Fi the mean of the sample. Class Boundaries Frequency 0.95-2.95 10 2.95-4.95 15 4.95-6.95 10 6.95-8.95 10 8.95-10.95 9

What is the range of the set of values 5, 8, 3, 9, and 17.

Find the mean for the following data set: 28 25 23 34 14 14

Find the sample standard deviation for the following data set: 25 13 31 33 20

Identify the five-number summary of the following data set. 7, 11, 21, 28, 32, 33, 37, 43.

A five-number summary of a data set consists of the minimum, $Q _ { 1 }$ , the median, $Q _ { 3 }$ , and the maximum.

Make a boxplot for the following data set. 24, 15, 34, 92, 68, 34, 78, 45, 53, 67, 83, 46

The number of police officers in selected city districts is listed below. Find the mode. 24, 26, 24, 30, 23, 28, 19, 31, 24, 26, 19

A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 hours with a standard deviation of 0.1 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with Lifetimes between 3.0 hours and 3.4 hours.

Following are heights, in inches, for a sample of college basketball players. 84 88 86 85 70 75 72 86 78 81 86 78 81 72 73 76 77 87 88 84 Find the sample standard deviation for the heights of the basketball players.

For the data set below, find the upper outlier boundary. 154 160 146 146 131 148 164 199 169 139 165

Chebyshev's theorem can be used to find the minimum percentage of the values in a data set that will fall within a certain distance of the mean.

A population has a mean $\mu = 23$ and standard deviation $\sigma = 10$ . What number has a $z$ -score of $2.5 ?$

The percentile corresponding to a given data value $X$ is computed by adding the $0.5$ to number of values less than $X$ then dividing by the total number of values in the data set.

A student has an average of 78 on seven chapter tests. If the student's scores on six of the tests are 72, 82, 84, 66, 68, and 89, what was the score on the remaining test?

The is the mode for grouped data.

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

A data set has a mean of 177 and a standard deviation of 20. Compute the coefficient of variation.

Find the mean of the following data set? 10, 5, 8, 3, 14

A random sample of weights (in carats) of sapphires in a jeweler's collection is shown. Fi the mean of the sample. Class Boundaries Frequency 0.95-2.95 10 2.95-4.95 15 4.95-6.95 10 6.95-8.95 10 8.95-10.95 9

What is the range of the set of values 5, 8, 3, 9, and 17.

The data shown represents the high scores for members of a bowling league over a particular season. Find the approximate percentile rank of a score of 265 by constructing ; percentile graph. Score Frequency 249.5-254.5 3 254.5-259.5 14 259.5-264.5 19 264.5-269.5 12 269.5-274.5 3

Find the mean for the following data set: 28 25 23 34 14 14

Find the sample standard deviation for the following data set: 25 13 31 33 20

Identify the five-number summary of the following data set. 7, 11, 21, 28, 32, 33, 37, 43.

A five-number summary of a data set consists of the minimum, Q1Q _ { 1 }Q1​ , the median, Q3Q _ { 3 }Q3​ , and the maximum.

Make a boxplot for the following data set. 24, 15, 34, 92, 68, 34, 78, 45, 53, 67, 83, 46

The number of police officers in selected city districts is listed below. Find the mode. 24, 26, 24, 30, 23, 28, 19, 31, 24, 26, 19

A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 hours with a standard deviation of 0.1 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with Lifetimes between 3.0 hours and 3.4 hours.

Following are heights, in inches, for a sample of college basketball players. 84 88 86 85 70 75 72 86 78 81 86 78 81 72 73 76 77 87 88 84 Find the sample standard deviation for the heights of the basketball players.

For the data set below, find the upper outlier boundary. 154 160 146 146 131 148 164 199 169 139 165

Chebyshev's theorem can be used to find the minimum percentage of the values in a data set that will fall within a certain distance of the mean.

A population has a mean μ=23\mu = 23μ=23 and standard deviation σ=10\sigma = 10σ=10 . What number has a zzz -score of 2.5?2.5 ?2.5?

The percentile corresponding to a given data value XXX is computed by adding the 0.50.50.5 to number of values less than XXX then dividing by the total number of values in the data set.

A student has an average of 78 on seven chapter tests. If the student's scores on six of the tests are 72, 82, 84, 66, 68, and 89, what was the score on the remaining test?

The is the mode for grouped data.

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

A five-number summary of a data set consists of the minimum, $Q _ { 1 }$ , the median, $Q _ { 3 }$ , and the maximum.

A population has a mean $\mu = 23$ and standard deviation $\sigma = 10$ . What number has a $z$ -score of $2.5 ?$

The percentile corresponding to a given data value $X$ is computed by adding the $0.5$ to number of values less than $X$ then dividing by the total number of values in the data set.