Question 1

The sum of deviations about the arithmetic mean is always equal to zero.

Accepted Answer

A) True 
 B)False  True

Question 2

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The mean time (in minutes) required for this trip was ___.

Accepted Answer

A)  35 
B)  41 
C)  37.5 
D)  38 
E)  35.5 
A)  35 
B)  41 
C)  37.5 
D)  38 
E)  35.5 D

Question 3

Karen Merlott, VP for Strategic Planning at a recruitment firm, recently conducts a survey to determine customer satisfaction with job placement. She distributed the survey to 45 of the most recently placed executives. Two items on a survey questionnaire them to rate the importance of "initial interview process" and "satisfaction of final job placement" on a scale of 1 to 10 (with 1 meaning "$\textbf{      not   }$  important" and 10 meaning "highly important"). Her staff assembled the following statistics on these two items.   What can Karen conclude from these statistics?

Accepted Answer

A)  The Initial Interview Process distribution is positively skewed. 
B)  The Initial Interview Process distribution is not skewed. 
C)  The Satisfaction of Final Job Placement distribution is negatively skewed. 
D)  The Satisfaction of Final Job Placement distribution is positively skewed. 
E)  Both are symmetrically distributed. 
A)  The Initial Interview Process distribution is positively skewed. 
B)  The Initial Interview Process distribution is not skewed. 
C)  The Satisfaction of Final Job Placement distribution is negatively skewed. 
D)  The Satisfaction of Final Job Placement distribution is positively skewed. 
E)  Both are symmetrically distributed. C

Question 4

When you use Excel's most powerful statistical tools, the results

Accepted Answer

A)  update automatically when you change the data. 
B)  are static. 
C)  can only be run for one statistical test at a time. 
D)  are temporary. 
A)  update automatically when you change the data. 
B)  are static. 
C)  can only be run for one statistical test at a time. 
D)  are temporary.

Question 5

The most frequently occurring value in a set of data is called the mode.

Accepted Answer

A) True 
 B)False

Question 6

Average deviation is a common measure of the variability of data containing a set of numbers.

Accepted Answer

A) True 
 B)False

Question 7

A statistics student made the following grades on five tests: 84, 78, 88, 72, and 72. What is the median grade?

Accepted Answer

A)  88 
B)  72 
C)  78 
D)  80 
E)  82 
A)  88 
B)  72 
C)  78 
D)  80 
E)  82

Question 8

Box and whisker plots are a slow method to determine skewness.

Accepted Answer

A) True 
 B)False

Question 9

The ages of students in a class have been put into the frequency distribution below.   
What is the standard deviation for this (population) set of data?

Accepted Answer

A)  0.494 
B)  0.703 
C)  1.12 
D)  1.25 
E)  1.35 
A)  0.494 
B)  0.703 
C)  1.12 
D)  1.25 
E)  1.35

Question 10

The following box and whisker plot was constructed for the age of accounts receivable:   The box and whisker plot reveals that the accounts receivable ages are ___.

Accepted Answer

A)  skewed to the left 
B)  skewed to the right 
C)  not skewed 
D)  normally distributed 
E)  symmetrical 
A)  skewed to the left 
B)  skewed to the right 
C)  not skewed 
D)  normally distributed 
E)  symmetrical

Question 11

The A-Life and Kafi companies have 40 and 65 employees respectively. Their average weekly wages are $450 and $350. The standard deviations are 7 and 9 respectively. Which company has a larger variability in wages?

Accepted Answer

A-Life’s coefficient of variat

Question 12

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the 5 Number Summary for the sample. (Note: The 5 Number Summary are the minimum, Q1, Q2, Q3 and the maximum).

Accepted Answer

Min = 13, Q1 = 54, Q

Question 13

The quartile divides the first three quarters of the data from the last quarter and is equal to the value of the 75th percentile.

Accepted Answer

A)  1st 
B)  2nd 
C)  3rd 
D)  4th 
A)  1st 
B)  2nd 
C)  3rd 
D)  4th

Question 14

In a hearing test, subjects estimated the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the mean, median and mode.

Accepted Answer

Mean = 70,

Question 15

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The median time (in minutes) required for this trip was ___.

Accepted Answer

A)  39 
B)  41 
C)  37.5 
D)  38 
E)  35.5 
A)  39 
B)  41 
C)  37.5 
D)  38 
E)  35.5

Question 16

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the range, interquartile range and the standard deviation.

Accepted Answer

Range = 71, Interqua

Question 17

In a hearing test, subjects estimate the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the median.

Accepted Answer

A)  68 
B)  75 
C)  70 
D)  69 
E)  73 
A)  68 
B)  75 
C)  70 
D)  69 
E)  73

Question 18

The number of standard deviations that a value (x) is above or below the mean is the ___.

Accepted Answer

A)  absolute deviation 
B)  coefficient of variation 
C)  interquartile range 
D)  z score 
E)  correlation coefficient 
A)  absolute deviation 
B)  coefficient of variation 
C)  interquartile range 
D)  z score 
E)  correlation coefficient

Question 19

Excel's most powerful statistical tools are found in the ___ ToolPak.

Accepted Answer

A)  Statistics 
B)  Descriptive Statistics 
C)  Analysis 
D)  Data Analysis 
A)  Statistics 
B)  Descriptive Statistics 
C)  Analysis 
D)  Data Analysis

Question 20

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

Accepted Answer

A) True 
 B)False

The sum of deviations about the arithmetic mean is always equal to zero.

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The mean time (in minutes) required for this trip was ___.

When you use Excel's most powerful statistical tools, the results

The most frequently occurring value in a set of data is called the mode.

Average deviation is a common measure of the variability of data containing a set of numbers.

A statistics student made the following grades on five tests: 84, 78, 88, 72, and 72. What is the median grade?

Box and whisker plots are a slow method to determine skewness.

The ages of students in a class have been put into the frequency distribution below. What is the standard deviation for this (population) set of data?

The following box and whisker plot was constructed for the age of accounts receivable: The box and whisker plot reveals that the accounts receivable ages are ___.

The A-Life and Kafi companies have 40 and 65 employees respectively. Their average weekly wages are $450 and $350. The standard deviations are 7 and 9 respectively. Which company has a larger variability in wages?

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the 5 Number Summary for the sample. (Note: The 5 Number Summary are the minimum, Q1, Q2, Q3 and the maximum).

The quartile divides the first three quarters of the data from the last quarter and is equal to the value of the 75th percentile.

In a hearing test, subjects estimated the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the mean, median and mode.

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The median time (in minutes) required for this trip was ___.

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the range, interquartile range and the standard deviation.

In a hearing test, subjects estimate the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the median.

The number of standard deviations that a value (x) is above or below the mean is the ___.

Excel's most powerful statistical tools are found in the ___ ToolPak.

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

Introduction to Statistics

Organizing and Visualizing Data

Gathering Data

Probability

Decision Analysis and Expected Value

Discrete Probability Distributions

Continuous Distributions

Sampling Distributions

Confidence Intervals

Hypothesis Testing for Single Populations

Hypothesis Testing for Two Populations

Analysis of Variance Anova

Linear Correlation and Simple Linear Regression Analysis

Categorical Versus Categorical: Tests

Filters

Exam 3: Descriptive Statistics

The sum of deviations about the arithmetic mean is always equal to zero.

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The mean time (in minutes) required for this trip was ___.

When you use Excel's most powerful statistical tools, the results

The most frequently occurring value in a set of data is called the mode.

Average deviation is a common measure of the variability of data containing a set of numbers.

A statistics student made the following grades on five tests: 84, 78, 88, 72, and 72. What is the median grade?

Box and whisker plots are a slow method to determine skewness.

The ages of students in a class have been put into the frequency distribution below. What is the standard deviation for this (population) set of data?

The following box and whisker plot was constructed for the age of accounts receivable: The box and whisker plot reveals that the accounts receivable ages are ___.

The A-Life and Kafi companies have 40 and 65 employees respectively. Their average weekly wages are $450 and $350. The standard deviations are 7 and 9 respectively. Which company has a larger variability in wages?

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the 5 Number Summary for the sample. (Note: The 5 Number Summary are the minimum, Q1, Q2, Q3 and the maximum).

The quartile divides the first three quarters of the data from the last quarter and is equal to the value of the 75th percentile.

In a hearing test, subjects estimated the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the mean, median and mode.

A commuter travels many kilometres to work each morning. She has timed this trip 5 times during the last month. The time (in minutes) required to make this trip was 34, 39, 41, 35, and 41. The median time (in minutes) required for this trip was ___.

The number of speeding tickets given by a sample of 14 police officers in a month are as follows: 63, 35, 67, 63, 55, 75, 84, 13, 67, 54, 59, 49, 58, and 67. Compute the range, interquartile range and the standard deviation.

In a hearing test, subjects estimate the loudness of a sound in decibels. The results are: 71, 68, 75, 68, 62, 80, 73, 68, 68, 67, 70. Compute the median.

The number of standard deviations that a value (x) is above or below the mean is the ___.

Excel's most powerful statistical tools are found in the ___ ToolPak.

If the median of a distribution is greater than mean, then the distribution is skewed to the left.

Introduction to Statistics

Organizing and Visualizing Data

Gathering Data

Probability

Decision Analysis and Expected Value

Discrete Probability Distributions

Continuous Distributions

Sampling Distributions

Confidence Intervals

Hypothesis Testing for Single Populations

Hypothesis Testing for Two Populations

Analysis of Variance Anova

Linear Correlation and Simple Linear Regression Analysis

Categorical Versus Categorical: Tests

Filters