Question 1

Find the median for the following data set: 
22 13 20 13 19

Accepted Answer

A) 13 
B) 19 
C) 17.4 
D) 9 
A) 13 
B) 19 
C) 17.4 
D) 9

Question 2

Find the median for the following data set: $$\begin{array} { l l l l l l } 
28 & 33 & 14 & 29 & 24 & 14
\end{array}$$

Accepted Answer

A)  26 
B)  19 
C)  23.7 
D)  14 
A)  26 
B)  19 
C)  23.7 
D)  14

Question 3

The completion times for a certain marathon race was 2.4 hours with a standard deviation of 0.5 hours. What can you determine about these data by using Chebyshev's Inequality with K = 2?

Accepted Answer

A)  At least 75% of the completion times are between 1.4 hours and 3.4 hours. 
B)  No more than 75% of the completion times are between 1.4 hours and 3.4 hours. 
C)  At most 88.9% of the completion times are between 1.4 hours and 3.4 hours. 
D)  At least 88.9% of the completion times are between 1.4 hours and 3.4 hours. 
A)  At least 75% of the completion times are between 1.4 hours and 3.4 hours. 
B)  No more than 75% of the completion times are between 1.4 hours and 3.4 hours. 
C)  At most 88.9% of the completion times are between 1.4 hours and 3.4 hours. 
D)  At least 88.9% of the completion times are between 1.4 hours and 3.4 hours.

Question 4

A data set has a mean of 157 and a standard deviation of 20. Compute the coefficient of variation.

Accepted Answer

A)  7.69 
B)  0.13 
C)  2.55 
D)  20.00 
A)  7.69 
B)  0.13 
C)  2.55 
D)  20.00

Question 5

For the data set below, find the third quartile. $$\begin{array} { l l l l l l l l l l } 
166 & 168 & 177 & 181 & 186 & 188 & 194 & 201 & 209 & 251
\end{array}$$

Accepted Answer

A)  183.5 
B)  201 
C)  194 
D)  177 
A)  183.5 
B)  201 
C)  194 
D)  177

Question 6

The table below lists the populations, in thousands, of several rural western counties. What is the mean population?

$\begin{array} { c c } 
\hline \text { County } & \text { Population (thousands) } \
\hline \text { Aldridge } & 28 \
\text { Cleveland } & 22 \
\text { McCarthy } & 11 \
\text { Pope } & 16 \
\text { Sorrell } & 26 \
\text { Wilson } & 21
\end{array}$

Accepted Answer

A)  17 thousand 
B)  20.7 thousand 
C)  21.5 thousand 
D)  19.5 thousand 
A)  17 thousand 
B)  20.7 thousand 
C)  21.5 thousand 
D)  19.5 thousand

Question 7

In Steve's statistics class, the final grade is a weighted mean of a homework grade, three midterm grades, and a final exam grade. The homework counts for 15% of the grade, each midterm counts For 15%, and the final exam counts for 40%. Steve got an average score of 60 on the homework, 80, 70, and 75 on the midterms, and 75 on the final. What is Steve's final grade?

Accepted Answer

A)  72 
B)  41 
C)  69 
D)  73 
A)  72 
B)  41 
C)  69 
D)  73

Question 8

Approximate the population variance given the following frequency distribution.

$\begin{array} { c c } 
\hline \text { Class } & \text { Frequency } \
\hline 0 - 14 & 12 \
15 - 29 & 16 \
30 - 44 & 15 \
45 - 59 & 9 \
60 - 74 & 11 \
\hline
\end{array}$

Accepted Answer

A)  20.3 
B)  413.3 
C)  419.9 
D)  20.5 
A)  20.3 
B)  413.3 
C)  419.9 
D)  20.5

Question 9

Find the median for the following data set: $$\begin{array} { l l l l l l } 
13 & 23 & 11 & 26 & 22 & 18
\end{array}$$

Accepted Answer

A)  5.4 
B)  18.8 
C)  20 
D)  15 
A)  5.4 
B)  18.8 
C)  20 
D)  15

Question 10

Find the mean for the following data set: 
15 31 34 20 26

Accepted Answer

A) 7.0 
B)  25.2 
C) 19 
D) 26 
A) 7.0 
B)  25.2 
C) 19 
D) 26

Question 11

The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season.

Find the median number of type A and type B cases in the first 15 weeks of the flu season.

Accepted Answer

A)  Type A: 1,078
Type B: 469 
B)  Type A: 1,003
Type B: 408 
C)  Type A: 1,546
Type B: 1,546 
D)  Type A: 2,156
Type B: 937 
A)  Type A: 1,078
Type B: 469 
B)  Type A: 1,003
Type B: 408 
C)  Type A: 1,546
Type B: 1,546 
D)  Type A: 2,156
Type B: 937

Question 12

For the data set below, find the third quartile.

$\begin{array} { l l l l l l l l l l l } 
\hline 70 & 70 & 76 & 66 & 76 & 75 & 61 & 67 & 60 & 71 & 74 \
\hline
\end{array}$

Accepted Answer

A)  66 
B)  52.5 
C)  60 
D)  75 
A)  66 
B)  52.5 
C)  60 
D)  75

Question 13

A soft-drink bottling company fills and ships soda in plastic bottles with a target volume of 354 milliliters. The filling machinery does not deliver a perfectly consistent volume of liquid to each Bottle, and the three quartiles for the fill volume are $Q _ { 1 } = 351 , Q _ { 2 } = 357 , \text { and } Q _ { 3 } = 360$ Find the IQR.

Accepted Answer

A)  13.5 
B)  10.8 
C)  3 
D)  9 
A)  13.5 
B)  10.8 
C)  3 
D)  9

Question 14

Find the mean for the following data set: $$\begin{array} { l l l l l l } 
21 & 13 & 15 & 24 & 29 & 13
\end{array}$$

Accepted Answer

A)  19.2 
B)  16 
C)  18 
D)  13 
A)  19.2 
B)  16 
C)  18 
D)  13

Question 15

Use the given frequency distribution to approximate the mean.

$\begin{array} { c c } 
\hline \text { Class } & \text { Frequency } \
\hline 0 - 19 & 19 \
20 - 39 & 17 \
40 - 59 & 12 \
60 - 79 & 12 \
80 - 99 & 19
\end{array}$

Accepted Answer

A)  48.7 
B)  30.4 
C)  15.8 
D)  30.2 
A)  48.7 
B)  30.4 
C)  15.8 
D)  30.2

Question 16

Construct a boxplot for the data set below.

$\begin{array} { l l l l l } 
\hline 95 & 95 & 95 & 97 & 90 \
89 & 90 & 85 & 91 & 84 \
89 & 91 & 92 & 89 & 89 \
89 & 88 & 89 & 91 & 90 \
\hline
\end{array}$

Accepted Answer

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

Find the median for the following data set: 22 13 20 13 19

Find the median for the following data set: 28 33 14 29 24 14

The completion times for a certain marathon race was 2.4 hours with a standard deviation of 0.5 hours. What can you determine about these data by using Chebyshev's Inequality with K = 2?

A data set has a mean of 157 and a standard deviation of 20. Compute the coefficient of variation.

For the data set below, find the third quartile. 166 168 177 181 186 188 194 201 209 251

The table below lists the populations, in thousands, of several rural western counties. What is the mean population? County Population (thousands) Aldridge 28 Cleveland 22 McCarthy 11 Pope 16 Sorrell 26 Wilson 21

Approximate the population variance given the following frequency distribution. Class Frequency 0-14 12 15-29 16 30-44 15 45-59 9 60-74 11

Find the median for the following data set: 13 23 11 26 22 18

Find the mean for the following data set: 15 31 34 20 26

The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season. Find the median number of type A and type B cases in the first 15 weeks of the flu season.

For the data set below, find the third quartile. 70 70 76 66 76 75 61 67 60 71 74

Find the mean for the following data set: 21 13 15 24 29 13

Use the given frequency distribution to approximate the mean. Class Frequency 0-19 19 20-39 17 40-59 12 60-79 12 80-99 19

Construct a boxplot for the data set below. 95 95 95 97 90 89 90 85 91 84 89 91 92 89 89 89 88 89 91 90

Basic Ideas

Graphical Summaries of Data

Summarizing Bivariate Data

Probability

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals

Hypothesis Testing

Two-Sample Confidence Intervals

Two-Sample Hypothesis Tests

Tests With Qualitative Data

Inference in Linear Models

Analysis of Variance

Nonparametric Statistics

Filters

Exam 3: Numerical Summaries of Data

Find the median for the following data set: 22 13 20 13 19

Find the median for the following data set: 28 33 14 29 24 14

The completion times for a certain marathon race was 2.4 hours with a standard deviation of 0.5 hours. What can you determine about these data by using Chebyshev's Inequality with K = 2?

A data set has a mean of 157 and a standard deviation of 20. Compute the coefficient of variation.

For the data set below, find the third quartile. 166 168 177 181 186 188 194 201 209 251

The table below lists the populations, in thousands, of several rural western counties. What is the mean population? County Population (thousands) Aldridge 28 Cleveland 22 McCarthy 11 Pope 16 Sorrell 26 Wilson 21

Approximate the population variance given the following frequency distribution. Class Frequency 0-14 12 15-29 16 30-44 15 45-59 9 60-74 11

Find the median for the following data set: 13 23 11 26 22 18

Find the mean for the following data set: 15 31 34 20 26

The following tables present the number of specimens that tested positive for Type A and Type B influenza in the United States during the first 15 weeks of a recent flu season. Find the median number of type A and type B cases in the first 15 weeks of the flu season.

For the data set below, find the third quartile. 70 70 76 66 76 75 61 67 60 71 74

Find the mean for the following data set: 21 13 15 24 29 13

Use the given frequency distribution to approximate the mean. Class Frequency 0-19 19 20-39 17 40-59 12 60-79 12 80-99 19

Construct a boxplot for the data set below. 95 95 95 97 90 89 90 85 91 84 89 91 92 89 89 89 88 89 91 90

Basic Ideas

Graphical Summaries of Data

Summarizing Bivariate Data

Probability

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals

Hypothesis Testing

Two-Sample Confidence Intervals

Two-Sample Hypothesis Tests

Tests With Qualitative Data

Inference in Linear Models

Analysis of Variance

Nonparametric Statistics

Filters