Question 1

What is the midrange of the following numbers? 5, 11, 10, 12, 4, 12, 18, 18, 18

Accepted Answer

A)  11 
B)  12 
C)  5 
D)  18 
A)  11 
B)  12 
C)  5 
D)  18 A

Question 2

Determine the range for this data: 4, 7, 3, 16, 5, 22, and 8:

Accepted Answer

A)  4 
B)  3 
C)  14 
D)  19 
A)  4 
B)  3 
C)  14 
D)  19 D

Question 3

The range of the dataset {-3, -7, 2, 14, 0} is

Accepted Answer

21

Question 4

John, who was a business student, received a grade corresponding to a z-score of 1 whereas his girl friend
who was studying engineering, received a grade corresponding to a z-score of 2. John's grade score was
necessarily below his girl friend's grade

Accepted Answer

A) True 
 B)False

Question 5

Compute the sample SD for the data set 1, 2, 3. Now construct a symmetrical dataset of 3 values with
mean 5 and sample SD equal to 1.

Accepted Answer

The answer of Compute the sample SD for the data...

Question 6

The maximum value in a data set is 100 and the minimum value is 20, an approximate value for the standard deviation is

Accepted Answer

A)  20 
B)  13.3 
C)  30 
D)  It cannot be determined from the data given 
A)  20 
B)  13.3 
C)  30 
D)  It cannot be determined from the data given

Question 7

$$\begin{array}{l}
\begin{array} { | l | l | l | } 
\hline \text { Grade } & \text { Class Boundaries } & \text { Frequency } \
\hline \mathrm { A } & 89.5 - 99.5 & 4 \
\hline \mathrm { B } & 79.5 - 89.5 & 7 \
\hline \mathrm { C } & 69.5 - 79.5 & 11 \
\hline \mathrm { D } & 59.5 - 69.5 & 3 \
\hline \mathrm { F } & 49.5 - 59.5 & 3 \
\hline
\end{array}\
\text { For the table below, find the } 75 ^ { \text {th } } \text { percentile. }
\end{array}$$

Accepted Answer

A)  78.6 
B)  76.8 
C)  70.4 
D)  74.0 
A)  78.6 
B)  76.8 
C)  70.4 
D)  74.0

Question 8

The unbiased estimator is included in the formula for calculating the variance of a sample because
without it, the computed variance usually underestimates the population variance.

Accepted Answer

A) True 
 B)False

Question 9

The percentile corresponding to a given value X is computed by adding the 0.5 to number of values below
X and dividing this value by the total number of values within the data set.

Accepted Answer

A) True 
 B)False

Question 10

$$\begin{array}{l}
\begin{array} { | l | l | } 
\hline \text { Temperature } & \text { Frequency } \
\hline 28.5 - 31.5 & 1 \
\hline 31.5 - 34.5 & 3 \
\hline 34.5 - 37.5 & 6 \
\hline 37.5 - 40.5 & 10 \
\hline 40.5 - 43.5 & 8 \
\hline 43.5 - 46.5 & 7 \
\hline
\end{array}\
\text { Using the following frequency distribution, find the } 40 ^ { \text {th } } \text { percentile. }
\end{array}$$

Accepted Answer

A)  37.2 
B)  40.5 
C)  36.4 
D)  38.7 
A)  37.2 
B)  40.5 
C)  36.4 
D)  38.7

Question 11

Find the median for the following data. 6, 7, 4, 5, 3, 7, 4

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  7 
A)  3 
B)  4 
C)  5 
D)  7

Question 12

$$\begin{array}{l}
\begin{array} { | l | l | l | } 
\hline \text { Grade } & \text { Class Boundaries } & \text { Frequency } \
\hline \mathrm { A } & 89.5 - 99.5 & 4 \
\hline \mathrm { B } & 79.5 - 89.5 & 7 \
\hline \mathrm { C } & 69.5 - 79.5 & 11 \
\hline \mathrm { D } & 59.5 - 69.5 & 3 \
\hline \mathrm { F } & 49.5 - 59.5 & 3 \
\hline
\end{array}\
\text { For the table below, calculate the variance }
\end{array}$$

Accepted Answer

A)  141.4 
B)  145.6 
C)  133.4 
D)  136.0 
A)  141.4 
B)  145.6 
C)  133.4 
D)  136.0

Question 13

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

Accepted Answer

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

Question 14

The median of {-1, 6, 3, 2, -1} is

Accepted Answer

The answer of The median of {-1, 6, 3, 2,...

Question 15

If a distribution is negatively skewed as shown in the figure below, the mean will fall to the right of the median and the mode will be on the left of the median.

Accepted Answer

A) True 
 B)False

Question 16

The mean of {0, 7, 5, 3, 5} is

Accepted Answer

The answer of The mean of {0, 7, 5, 3,...

Question 17

Find the mean, mode, median, and midrange value for the following data set. 
12, 15, 18, 18, 15, 22, 15, 30, 12

Accepted Answer

mean = 17.4, mode =

Question 18

The grades for a trigonometry exam follow. Find the range. 85, 76, 93, 82, 84, 90, 75

Accepted Answer

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

Question 19

The mean of {-2, 0, 0, 0, -2, 4} is

Accepted Answer

The answer of The mean of {-2, 0, 0, 0,...

Question 20

If the mean of a set of data is 19.00, and 7.00 has a z-score of -1.50, then the standard deviation must be:

Accepted Answer

A)  8.00 
B)  64.00 
C)  4.00 
D)  32.00 
A)  8.00 
B)  64.00 
C)  4.00 
D)  32.00

What is the midrange of the following numbers? 5, 11, 10, 12, 4, 12, 18, 18, 18

Determine the range for this data: 4, 7, 3, 16, 5, 22, and 8:

The range of the dataset {-3, -7, 2, 14, 0} is

John, who was a business student, received a grade corresponding to a z-score of 1 whereas his girl friend who was studying engineering, received a grade corresponding to a z-score of 2. John's grade score was necessarily below his girl friend's grade

Compute the sample SD for the data set 1, 2, 3. Now construct a symmetrical dataset of 3 values with mean 5 and sample SD equal to 1.

The maximum value in a data set is 100 and the minimum value is 20, an approximate value for the standard deviation is

Grade Class Boundaries Frequency 89.5-99.5 4 79.5-89.5 7 69.5-79.5 11 59.5-69.5 3 49.5-59.5 3 For the table below, find the 7 percentile.

The unbiased estimator is included in the formula for calculating the variance of a sample because without it, the computed variance usually underestimates the population variance.

The percentile corresponding to a given value X is computed by adding the 0.5 to number of values below X and dividing this value by the total number of values within the data set.

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 Using the following frequency distribution, find the 4 percentile.

Find the median for the following data. 6, 7, 4, 5, 3, 7, 4

Grade Class Boundaries Frequency 89.5-99.5 4 79.5-89.5 7 69.5-79.5 11 59.5-69.5 3 49.5-59.5 3 For the table below, calculate the variance

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

The median of {-1, 6, 3, 2, -1} is

If a distribution is negatively skewed as shown in the figure below, the mean will fall to the right of the median and the mode will be on the left of the median.

The mean of {0, 7, 5, 3, 5} is

Find the mean, mode, median, and midrange value for the following data set. 12, 15, 18, 18, 15, 22, 15, 30, 12

The grades for a trigonometry exam follow. Find the range. 85, 76, 93, 82, 84, 90, 75

The mean of {-2, 0, 0, 0, -2, 4} is

If the mean of a set of data is 19.00, and 7.00 has a z-score of -1.50, then the standard deviation must be:

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

What is the midrange of the following numbers? 5, 11, 10, 12, 4, 12, 18, 18, 18

Determine the range for this data: 4, 7, 3, 16, 5, 22, and 8:

The range of the dataset {-3, -7, 2, 14, 0} is

John, who was a business student, received a grade corresponding to a z-score of 1 whereas his girl friend who was studying engineering, received a grade corresponding to a z-score of 2. John's grade score was necessarily below his girl friend's grade

Compute the sample SD for the data set 1, 2, 3. Now construct a symmetrical dataset of 3 values with mean 5 and sample SD equal to 1.

The maximum value in a data set is 100 and the minimum value is 20, an approximate value for the standard deviation is

Grade Class Boundaries Frequency 89.5-99.5 4 79.5-89.5 7 69.5-79.5 11 59.5-69.5 3 49.5-59.5 3 For the table below, find the 7 percentile.

The unbiased estimator is included in the formula for calculating the variance of a sample because without it, the computed variance usually underestimates the population variance.

The percentile corresponding to a given value X is computed by adding the 0.5 to number of values below X and dividing this value by the total number of values within the data set.

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 Using the following frequency distribution, find the 4 percentile.

Find the median for the following data. 6, 7, 4, 5, 3, 7, 4

Grade Class Boundaries Frequency 89.5-99.5 4 79.5-89.5 7 69.5-79.5 11 59.5-69.5 3 49.5-59.5 3 For the table below, calculate the variance

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

The median of {-1, 6, 3, 2, -1} is

If a distribution is negatively skewed as shown in the figure below, the mean will fall to the right of the median and the mode will be on the left of the median.

The mean of {0, 7, 5, 3, 5} is

Find the mean, mode, median, and midrange value for the following data set. 12, 15, 18, 18, 15, 22, 15, 30, 12

The grades for a trigonometry exam follow. Find the range. 85, 76, 93, 82, 84, 90, 75

The mean of {-2, 0, 0, 0, -2, 4} is

If the mean of a set of data is 19.00, and 7.00 has a z-score of -1.50, then the standard deviation must be:

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