Question 1

Which measures of central tendency always have but one value for a set of grouped or ungrouped data?

Accepted Answer

A)  Mode and median 
B)  Mode and mean 
C)  Mode and geometric mean 
D)  Mean and median 
E)  None of the choices are correct. 
A)  Mode and median 
B)  Mode and mean 
C)  Mode and geometric mean 
D)  Mean and median 
E)  None of the choices are correct.

Question 2

i. For salaries of $102,000, $98,000, $45,000, $106,000 and $101,000, the arithmetic mean would be an appropriate average.
Ii) Extremely high or low scores affect the value of the median.
Iii) Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. The weighted mean hourly wage is $10.

Accepted Answer

A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false 
A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false

Question 3

i. An outlier is a value in a data set that is inconsistent with the rest of the data. 
ii. The interquartile range is the difference between the values of the first and third quartile, indicating the range of the middle fifty percent of the observations.
Iii) A student scored in the 85 percentile on a standardized test. This means that the student scored lower than 85% of the rest of the students taking the test.

Accepted Answer

A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (i) is a correct statement, but not (ii) or (iii). 
E)  All statements are false 
A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (i) is a correct statement, but not (ii) or (iii). 
E)  All statements are false

Question 4

The lengths of time (in minutes) several underwriters took to review applications for similar insurance coverage are: 50, 230, 52 and 57. What is the median length of time required to review an application?

Accepted Answer

A)  54.5 
B)  141.0 
C)  97.25 
D)  109.0 
E)  None of the choices are correct. 
A)  54.5 
B)  141.0 
C)  97.25 
D)  109.0 
E)  None of the choices are correct.

Question 5

The only time the variance equals the standard deviation is when ___________.

Accepted Answer

The answer of The only time the variance equals the...

Question 6

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are:

-Correct to two decimal places, the sample standard deviation is approximately_______

Accepted Answer

The answer of The weights of a sample of 100...

Question 7

The capacities of several metal containers are: 38, 20, 37, 64, and 27 litres. The range in litres is_____

Accepted Answer

The answer of The capacities of several metal containers are:...

Question 8

Rank the measures of dispersion in terms of their relative computational difficulty from least to most difficulty.

Accepted Answer

A)  Mode, median, mean 
B)  Range, mean deviation, variance 
C)  Variance, mean deviation, range 
D)  There is no difference 
A)  Mode, median, mean 
B)  Range, mean deviation, variance 
C)  Variance, mean deviation, range 
D)  There is no difference

Question 9

In the relationship between the median and the mode in a positively skewed distribution, the________ is greater than the___________.

Accepted Answer

The answer of In the relationship between the median and...

Question 10

The smallest measure of central tendency in a positively skewed distribution is the________

Accepted Answer

The answer of The smallest measure of central tendency in...

Question 11

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are:

-The mean deviation for nylon carpet is __________.

Accepted Answer

The answer of The weights of a sample of 100...

Question 12

The Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1977 to $5,100 million in 2000. What is the geometric mean annual percent increase in international passenger revenues?

Accepted Answer

A)  10.4 
B)  27.9 
C)  103.6 
D)  9.96 
E)  None of the choices are correct. 
A)  10.4 
B)  27.9 
C)  103.6 
D)  9.96 
E)  None of the choices are correct.

Question 13

A bottling company offers three kinds of delivery service - instant, same day and within five days. The profit per delivery varies according to the kind of delivery. The profit for an instant delivery is less than the other kinds because the driver has to go directly to a grocery store with a small load and return to the bottling plant. To find out what effect each type of delivery has on the profit picture, the company has made the following tabulation based on deliveries for the previous quarter.   What is the weighted mean profit per delivery?

Accepted Answer

A)  $72 
B)  $100 
C)  $142 
D)  $97 
E)  None of the choices are correct. 
A)  $72 
B)  $100 
C)  $142 
D)  $97 
E)  None of the choices are correct.

Question 14

Based on the values of the arithmetic mean, median, and mode,_____ is the most likely shape of the distribution.

Accepted Answer

The answer of Based on the values of the arithmetic...

Question 15

i. A value that is typical or representative of the data is referred to as a measure of central tendency. 
ii. The arithmetic mean is the sum of the observations divided by the total number of observations iii. The value of the observation in the center after they have been arranged in numerical order is called the weighted mean

Accepted Answer

A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false 
A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (ii) and, (iii) are correct statements but not (i). 
E)  All statements are false

Question 16

Based on the graph below, how can we best describe the shape of this distribution?

Accepted Answer

A)  Relatively symmetrical 
B)  Positively skewed 
C)  Negatively skewed 
D)  No variation 
E)  Bimodal 
A)  Relatively symmetrical 
B)  Positively skewed 
C)  Negatively skewed 
D)  No variation 
E)  Bimodal

Question 17

i. If there is an even number of ungrouped values, then half of the values will be less than the median. 
ii. Extremely high or low scores affect the value of the median. 
iii. There are always as many values above the mean as below it.

Accepted Answer

A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (i) is a correct statement, but not (ii) or (iii). 
E)  All statements are false 
A)  (i), (ii) and (iii) are all correct statements 
B)  (i) and, (ii) are correct statements but not (iii). 
C)  (i) and, (iii) are correct statements but not (ii). 
D)  (i) is a correct statement, but not (ii) or (iii). 
E)  All statements are false

Question 18

75 litres. What is the Pearson's coefficient of skewness?

Accepted Answer

A)  -1.00 
B)  -0.75 
C)  +0.75 
D)  +1.00 
E)  None of the choices are correct. 
A)  -1.00 
B)  -0.75 
C)  +0.75 
D)  +1.00 
E)  None of the choices are correct.

Question 19

The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?

Accepted Answer

A)  5.43 kg 
B)  6.25 kg 
C)  0.53 kg 
D)  52.50 kg 
E)  None of the choices are correct. 
A)  5.43 kg 
B)  6.25 kg 
C)  0.53 kg 
D)  52.50 kg 
E)  None of the choices are correct.

Question 20

What disadvantage(s) are there of the mean deviation?

Accepted Answer

A)  Based on only two observations 
B)  Based on deviations from the mean 
C)  Uses absolute values, which are difficult to manipulate 
D)  All of the choices are correct. 
E)  None of the choices are correct. 
A)  Based on only two observations 
B)  Based on deviations from the mean 
C)  Uses absolute values, which are difficult to manipulate 
D)  All of the choices are correct. 
E)  None of the choices are correct.

Which measures of central tendency always have but one value for a set of grouped or ungrouped data?

The lengths of time (in minutes) several underwriters took to review applications for similar insurance coverage are: 50, 230, 52 and 57. What is the median length of time required to review an application?

The only time the variance equals the standard deviation is when ___________.

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are: -Correct to two decimal places, the sample standard deviation is approximately_______

The capacities of several metal containers are: 38, 20, 37, 64, and 27 litres. The range in litres is_____

Rank the measures of dispersion in terms of their relative computational difficulty from least to most difficulty.

In the relationship between the median and the mode in a positively skewed distribution, the is greater than the___.

The smallest measure of central tendency in a positively skewed distribution is the________

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are: -The mean deviation for nylon carpet is __________.

The Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1977 to $5,100 million in 2000. What is the geometric mean annual percent increase in international passenger revenues?

Based on the values of the arithmetic mean, median, and mode,_____ is the most likely shape of the distribution.

Based on the graph below, how can we best describe the shape of this distribution?

i. If there is an even number of ungrouped values, then half of the values will be less than the median. ii. Extremely high or low scores affect the value of the median. iii. There are always as many values above the mean as below it.

75 litres. What is the Pearson's coefficient of skewness?

The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?

What disadvantage(s) are there of the mean deviation?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentation

A Survey of Probability Concepts

Discrete Probability Distributions

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Exam 3: Describing Data: Numerical Measures

Which measures of central tendency always have but one value for a set of grouped or ungrouped data?

The lengths of time (in minutes) several underwriters took to review applications for similar insurance coverage are: 50, 230, 52 and 57. What is the median length of time required to review an application?

The only time the variance equals the standard deviation is when ___________.

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are: -Correct to two decimal places, the sample standard deviation is approximately_______

The capacities of several metal containers are: 38, 20, 37, 64, and 27 litres. The range in litres is_____

Rank the measures of dispersion in terms of their relative computational difficulty from least to most difficulty.

In the relationship between the median and the mode in a positively skewed distribution, the________ is greater than the___________.

The smallest measure of central tendency in a positively skewed distribution is the________

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are: -The mean deviation for nylon carpet is __________.

The Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1977 to $5,100 million in 2000. What is the geometric mean annual percent increase in international passenger revenues?

Based on the values of the arithmetic mean, median, and mode,_____ is the most likely shape of the distribution.

Based on the graph below, how can we best describe the shape of this distribution?

i. If there is an even number of ungrouped values, then half of the values will be less than the median. ii. Extremely high or low scores affect the value of the median. iii. There are always as many values above the mean as below it.

75 litres. What is the Pearson's coefficient of skewness?

The weights (in kilograms) of a group of crates being shipped to Panama are 95, 103, 110, 104, 105, 112 and 92. What is the mean deviation?

What disadvantage(s) are there of the mean deviation?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentation

A Survey of Probability Concepts

Discrete Probability Distributions

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

In the relationship between the median and the mode in a positively skewed distribution, the is greater than the___.