Question 1

A student scored 75 points on a test where the mean score was 81 and the standard deviation was 6. The student's z-score was

Accepted Answer

A)  13.50 
B)  0.17 
C)  -0.17 
D)  -1.00 
A)  13.50 
B)  0.17 
C)  -0.17 
D)  -1.00

Question 2

A weighted mean is used when the values of the data set are not all equally represented.

Accepted Answer

A) True 
 B)False

Question 3

To find the mean for grouped data, we take the sum of all the frequencies, multiply this by the midpoint
of each class and then divide boor the sample size.

Accepted Answer

A) True 
 B)False

Question 4

______________ divide the distribution into four groups, and __________ divide the distribution into ten
groups.

Accepted Answer

The answer of ______________ divide the distribution into four groups,...

Question 5

$$\text { In a unimodal, symmetrical distribution as shown in the figure below. }$$

Accepted Answer

A)  The mean is the same as the median, but the mode can be different. 
B)  The mean, the median, and the mode are the same. 
C)  The median and the mode are the same, but the mean can be different. 
D)  The mean, the median, and the mode are different. 
A)  The mean is the same as the median, but the mode can be different. 
B)  The mean, the median, and the mode are the same. 
C)  The median and the mode are the same, but the mean can be different. 
D)  The mean, the median, and the mode are different.

Question 6

If a set of data has 64 points and variance 16, then the standard deviation is

Accepted Answer

A)  2.00 
B)  0.06 
C)  0.50 
D)  4.00 
A)  2.00 
B)  0.06 
C)  0.50 
D)  4.00

Question 7

Using the following frequency distribution, find the mean. 
$\begin{array}{|l|l|}
\hline \text { Temperature } & \text { Frequency } \
\hline 28.5-31.5 & 1 \
\hline 31.5-34.5 & 3 \
\hline 34.5-37.5 & 6 \
\hline 37.5-40.5 & 10 \
\hline 40.5-43.5 & 8 \
\hline 43.5-46.5 & 7 \
\hline
\end{array}$

Accepted Answer

A)  38.1 
B)  39.6 
C)  41.1 
D)  40.8 
A)  38.1 
B)  39.6 
C)  41.1 
D)  40.8

Question 8

The coefficient of variation is the mean divided by the standard deviation expressed as a percentage.

Accepted Answer

A) True 
 B)False

Question 9

The maximum of the set of numbers {6, 16, -5, 11, 5} is

Accepted Answer

A)  -5 
B)  16 
C)  9.5 
D)  13 
A)  -5 
B)  16 
C)  9.5 
D)  13

Question 10

Which of the following is the mode for the given data? 5, 4, 3, 4, 5, 6, 5, 5, 3, 4

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 11

What is the median of the following numbers? 1, 3, 6, 8, 12

Accepted Answer

A)  3 
B)  5 
C)  6 
D)  7 
A)  3 
B)  5 
C)  6 
D)  7

Question 12

Given the following data set, the IQR is 7. $$3,8,8,10,15,40$$

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is true?

Accepted Answer

A)  $D _ { 5 } = P _ { \mathrm { S } } = Q _ { 5 }$ 
B)  $D _ { 50 } = P _ { 5 } = Q _ { 25 }$ 
C)  $D _ { 5 } = P _ { 50 } = Q _ { 2 }$ 
D)  $D _ { 50 } = P _ { 5 } = Q _ { 2 }$ 
A)  $D _ { 5 } = P _ { \mathrm { S } } = Q _ { 5 }$ 
B)  $D _ { 50 } = P _ { 5 } = Q _ { 25 }$ 
C)  $D _ { 5 } = P _ { 50 } = Q _ { 2 }$ 
D)  $D _ { 50 } = P _ { 5 } = Q _ { 2 }$

Question 14

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...

Question 15

In exploratory data analysis, ______________ are used instead of quartiles to construct boxplots. 
________________________________________

Accepted Answer

The answer of In exploratory data analysis, ______________ are used...

Question 16

A distribution in which approximately $68 \%$ of the data values fall within one standard deviation of the mean behaves according to

Accepted Answer

A)  the empirical rule. 
B)  a symmetrical distribution. 
C)  a boxplot. 
D)  differential statistics. 
A)  the empirical rule. 
B)  a symmetrical distribution. 
C)  a boxplot. 
D)  differential statistics.

Question 17

The _______________ and ______________ are used to determine the consistency of a variable. 
________________________________________

Accepted Answer

variance;

Question 18

If the five number summary for a set of data is 2, 5, 8, 9, and 18, then the mean of this set of data is

Accepted Answer

A)  10 
B)  8 
C)  7 
D)  there is insufficient information to calculate the mean 
A)  10 
B)  8 
C)  7 
D)  there is insufficient information to calculate the mean

Question 19

$$\begin{array}{l}
\begin{array} { | l | l | } 
\hline \text { Class Boundaries } & \text { Frequencies } \
\hline 13.5 - 18.5 & 4 \
\hline 18.5 - 23.5 & 9 \
\hline 23.5 - 28.5 & 12 \
\hline 28.5 - 33.5 & 15 \
\hline 33.5 - 38.5 & 17 \
\hline
\end{array}\
\text { Given the following frequency distribution, find the variance. }
\end{array}$$

Accepted Answer

A)  43.5 
B)  40.2 
C)  48.6 
D)  42.3 
A)  43.5 
B)  40.2 
C)  48.6 
D)  42.3

Question 20

Methods commonly called traditional statistics include using measures of position, Chebyshev's theorem,
and the coefficient of variation.

Accepted Answer

A) True 
 B)False

A student scored 75 points on a test where the mean score was 81 and the standard deviation was 6. The student's z-score was

A weighted mean is used when the values of the data set are not all equally represented.

To find the mean for grouped data, we take the sum of all the frequencies, multiply this by the midpoint of each class and then divide boor the sample size.

____ divide the distribution into four groups, and divide the distribution into ten groups.

$\text { In a unimodal, symmetrical distribution as shown in the figure below. }$ $\text { In a unimodal, symmetrical distribution as shown in the figure below. }$

If a set of data has 64 points and variance 16, then the standard deviation is

Using the following frequency distribution, find the mean. Temperature Frequency 28.5-31.5 1 31.5-34.5 3 34.5-37.5 6 37.5-40.5 10 40.5-43.5 8 43.5-46.5 7

The coefficient of variation is the mean divided by the standard deviation expressed as a percentage.

The maximum of the set of numbers {6, 16, -5, 11, 5} is

Which of the following is the mode for the given data? 5, 4, 3, 4, 5, 6, 5, 5, 3, 4

What is the median of the following numbers? 1, 3, 6, 8, 12

Given the following data set, the IQR is 7. $3,8,8,10,15,40$

Which of the following is true?

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

In exploratory data analysis, are used instead of quartiles to construct boxplots. __________________________

A distribution in which approximately $68 \%$ of the data values fall within one standard deviation of the mean behaves according to

The _ and are used to determine the consistency of a variable. ____________________________

If the five number summary for a set of data is 2, 5, 8, 9, and 18, then the mean of this set of data is

Class Boundaries Frequencies 13.5-18.5 4 18.5-23.5 9 23.5-28.5 12 28.5-33.5 15 33.5-38.5 17 Given the following frequency distribution, find the variance.

Methods commonly called traditional statistics include using measures of position, Chebyshev's theorem, and the coefficient of variation.

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

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

Correlation and Regression

Chi-Square and Analysis of Variance Anova

Tables

Data Bank

Glossary

Filters

Exam 3: Data Description

A student scored 75 points on a test where the mean score was 81 and the standard deviation was 6. The student's z-score was

A weighted mean is used when the values of the data set are not all equally represented.

To find the mean for grouped data, we take the sum of all the frequencies, multiply this by the midpoint of each class and then divide boor the sample size.

______________ divide the distribution into four groups, and __________ divide the distribution into ten groups.

In a unimodal, symmetrical distribution as shown in the figure below. \text { In a unimodal, symmetrical distribution as shown in the figure below. } In a unimodal, symmetrical distribution as shown in the figure below.

If a set of data has 64 points and variance 16, then the standard deviation is

Using the following frequency distribution, find the mean. Temperature Frequency 28.5-31.5 1 31.5-34.5 3 34.5-37.5 6 37.5-40.5 10 40.5-43.5 8 43.5-46.5 7

The coefficient of variation is the mean divided by the standard deviation expressed as a percentage.

The maximum of the set of numbers {6, 16, -5, 11, 5} is

Which of the following is the mode for the given data? 5, 4, 3, 4, 5, 6, 5, 5, 3, 4

What is the median of the following numbers? 1, 3, 6, 8, 12

Given the following data set, the IQR is 7. 3,8,8,10,15,403,8,8,10,15,403,8,8,10,15,40

Which of the following is true?

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

In exploratory data analysis, ______________ are used instead of quartiles to construct boxplots. ________________________________________

A distribution in which approximately 68%68 \%68% of the data values fall within one standard deviation of the mean behaves according to

The _______________ and ______________ are used to determine the consistency of a variable. ________________________________________

If the five number summary for a set of data is 2, 5, 8, 9, and 18, then the mean of this set of data is

Class Boundaries Frequencies 13.5-18.5 4 18.5-23.5 9 23.5-28.5 12 28.5-33.5 15 33.5-38.5 17 Given the following frequency distribution, find the variance.

Methods commonly called traditional statistics include using measures of position, Chebyshev's theorem, and the coefficient of variation.

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

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

Correlation and Regression

Chi-Square and Analysis of Variance Anova

Tables

Data Bank

Glossary

Filters

____ divide the distribution into four groups, and divide the distribution into ten groups.

$\text { In a unimodal, symmetrical distribution as shown in the figure below. }$ $\text { In a unimodal, symmetrical distribution as shown in the figure below. }$

Given the following data set, the IQR is 7. $3,8,8,10,15,40$

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

In exploratory data analysis, are used instead of quartiles to construct boxplots. __________________________

A distribution in which approximately $68 \%$ of the data values fall within one standard deviation of the mean behaves according to

The _ and are used to determine the consistency of a variable. ____________________________