Question 1

(i. The mode is 21.
(ii. The arithmetic mean is 20.4.
(iii) The median is 21.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements. A

Question 2

(i. If a distribution is highly skewed, the mean (measure of central tendency) should be avoided.
(ii. A characteristic of the population is called a statistic.
(iii) A sample revealed that the ages of musicians playing in small local combos are 36, 29, 37, 32,
36 and 75. The median is the most appropriate measure of central tendency to represent the ages
Of the musicians.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements. C

Question 3

(i. The mode is 21.
(ii. The arithmetic mean is 20.4.
(iii) The median is 23.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements. B

Question 4

The ages of newly hired, unskilled employees were grouped into the following distribution:   What is the median age?

Accepted Answer

A)  28.50 
B)  28.08 
C)  25.08 
D)  27.14 
E)  20.00 
A)  28.50 
B)  28.08 
C)  25.08 
D)  27.14 
E)  20.00

Question 5

(i. The mean is the measure of central tendency that uses all of the observations in its calculation.
(ii. The mode is the class with the largest number of observations.
(iii) If a set of observations contains an extreme value and none of the observations repeat
Themselves, the mean is the most representative measure of central tendency.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 6

(i. The range for laminate ﬂooring is 0 or none.
(ii. The range for polyester carpet is $0.04 or 4 cents.
(iii) The mean deviation for laminate ﬂooring is 0.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 7

i. The standard deviation is the positive square root of the variance.
ii. For a symmetrical distribution, the variance is equal to the standard deviation.
iii. If the standard deviation of the ages of a female group of employees is six years and the
Standard deviation of the ages of a male group in the same plant is ten years, it indicates that there
Is more spread in the ages of the female employees.

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)  (i), (ii) and (iii) are all false statements 
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)  (i), (ii) and (iii) are all false statements

Question 8

Fifteen accounting majors had an average grade of 90 on a ﬁnance exam. Seven marketing majors
Averaged 85, while ten ﬁnance majors averaged 93 on the same exam. What is the weighted mean
For the 32 students taking the exam?

Accepted Answer

A)  89.84 
B)  89.33 
C)  89.48 
D)  Impossible to determine without more information 
E)  $89.88 
A)  89.84 
B)  89.33 
C)  89.48 
D)  Impossible to determine without more information 
E)  $89.88

Question 9

Listed below is the box plot of average earnings ratio for full-year, full-time male workers from 1999
To 2008:  
From this we can interpret that the range of average earnings for men for the years 1999-2008 was
Approximately:

Accepted Answer

A)  $400 
B)  $900 
C)  $2,000 
D)  $3,000 
E)  $3,900 
A)  $400 
B)  $900 
C)  $2,000 
D)  $3,000 
E)  $3,900

Question 10

(i. The arithmetic mean (measure of central tendency) cannot be determined if the distribution has
An open-ended class.
(ii. The measure of central tendency used to determine the average annual percent increase in
Sales from one time period to another is the arithmetic mean.
(iii) The smallest measure of central tendency in a positively skewed distribution is the mode

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 11

Using the information gathered for real estate prices in Regina and surrounding areas in the early
2000's, determine the mean of the selling prices at that time.

Accepted Answer

A)  $188,330 
B)  $200,000 
C)  $125,000 
D)  $178,350 
E)  $195,600 
A)  $188,330 
B)  $200,000 
C)  $125,000 
D)  $178,350 
E)  $195,600

Question 12

If a major sports star were to move into your neighbourhood, what would you expect to happen to
The neighbourhood's "average" income?

Accepted Answer

A)  The mean income would increase signiﬁcantly 
B)  The median income would increase signiﬁcantly 
C)  The modal income would increase signiﬁcantly 
D)  The mean income would increase signiﬁcantly, but the modal income and median income would decrease 
E)  The standard deviation of the neighbourhood's income would get smaller 
A)  The mean income would increase signiﬁcantly 
B)  The median income would increase signiﬁcantly 
C)  The modal income would increase signiﬁcantly 
D)  The mean income would increase signiﬁcantly, but the modal income and median income would decrease 
E)  The standard deviation of the neighbourhood's income would get smaller

Question 13

(i. The research director of a large oil company conducted a study of the buying habits of
Consumers with respect to the amount of gasoline purchased at full-service pumps. The arithmetic
Mean amount is 11.5 gallons and the median amount is 11.95 litres. The standard deviation of the
Sample is 4.5 litres. The Pearson's coeﬃcient of skewness can be calculated to be -0.30.
(ii. Rainbow Trout, Inc., feeds ﬁngerling trout in special ponds and markets them when they attain a
Certain weight. A group of 9 trout (considered the population) were isolated in a pond and fed a
Special food mixture called Grow Em Fast. At the end of the experimental period, the weights of the
Trout were (in grams): 124, 125, 123, 120, 124, 127, 125, 126 and 121. Another special mixture, Fatso 1B,
Was used in another pond. The mean of the population was computed to be 126.9 grams and the
Standard deviation was 1.20 grams. When these data are analysed, we discover that the food
Resulting in a more uniform weight is Fatso 1B.
(iii) A study has been made of the number of hours a light bulb will operate before it burns out. If the
Standard deviation of this distribution were computed, it would be measured in hours squared

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 14

(i. A small manufacturing company with 52 employees has annual salaries distributed such that the
Mean is $25,459, the median is $24,798 and the mode is $24,000. An additional foreman is hired at
An annual salary of $50,700. The measure of central tendency that is most affected by the addition
Of this salary is the arithmetic mean.
(ii. In the relationship between the mean and median in a negatively skewed distribution the mean is
Less than the median.
(iii) In the relationship between the median and the mode in a positively skewed distribution, the
Median is greater than the mode.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 15

What is a disadvantage of the range as a measure of dispersion?

Accepted Answer

A)  Based on only two observations 
B)  Can be distorted by a large mean 
C)  Not in the same units as the original data 
D)  Has no disadvantage 
A)  Based on only two observations 
B)  Can be distorted by a large mean 
C)  Not in the same units as the original data 
D)  Has no disadvantage

Question 16

(i. The range for laminate ﬂooring is 0 or none.
(ii. The standard deviation for nylon carpet is 4.64 cents
(iii) The range for nylon carpet is $0.12 or 12 cents.

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)  (i), (ii) and (iii) are all false statements. 
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)  (i), (ii) and (iii) are all false statements.

Question 17

What is a disadvantage of the range as a measure of dispersion?

Accepted Answer

A)  Based on only two observations 
B)  Can be distorted by a large mean 
C)  Not in the same units as the original data 
D)  Has no disadvantage 
A)  Based on only two observations 
B)  Can be distorted by a large mean 
C)  Not in the same units as the original data 
D)  Has no disadvantage

Question 18

Which one of the following is referred to as the population mean?

Accepted Answer

A)  Statistic 
B)  µ 
C)  Sample 
D)  ∑ 
A)  Statistic 
B)  µ 
C)  Sample 
D)  ∑

Question 19

The annual incomes of the ﬁve vice presidents of Elly's Industries are: $41,000, $38,000, $32,000,
$33,000 and $50,000. The annual incomes of Unique, another ﬁrm similar to Elly's Industries, were
Also studied and found to have a mean of $38,900 and a standard deviation of $6,612. Which ﬁrm
Has the greater coeﬃcient of variation?

Accepted Answer

A)  Elly's Industries 
B)  Uniquee 
C)  Both ﬁrms have the same coeﬃcient of variation 
D)  We have not been given suﬃcient information to determine. 
A)  Elly's Industries 
B)  Uniquee 
C)  Both ﬁrms have the same coeﬃcient of variation 
D)  We have not been given suﬃcient information to determine.

Question 20

Mr. and Mrs. Jones live in a neighbourhood where the mean family income is $45,000 with a
Standard deviation of $9,000. Mr. and Mrs. Smith live in a neighbourhood where the mean is
$100,000 and the standard deviation is $30,000. What are the relative dispersions of the family
Incomes in the two neighbourhoods?

Accepted Answer

A)  Jones 40%, Smith 20% 
B)  Jones 20%, Smith 30% 
C)  Jones 30%, Smith 20% 
D)  Jones 50%, Smith 33% 
A)  Jones 40%, Smith 20% 
B)  Jones 20%, Smith 30% 
C)  Jones 30%, Smith 20% 
D)  Jones 50%, Smith 33%

(i. The mode is 21. (ii. The arithmetic mean is 20.4. (iii) The median is 21.

(i. The mode is 21. (ii. The arithmetic mean is 20.4. (iii) The median is 23.

The ages of newly hired, unskilled employees were grouped into the following distribution: What is the median age?

(i. The range for laminate ﬂooring is 0 or none. (ii. The range for polyester carpet is $0.04 or 4 cents. (iii) The mean deviation for laminate ﬂooring is 0.

Fifteen accounting majors had an average grade of 90 on a ﬁnance exam. Seven marketing majors Averaged 85, while ten ﬁnance majors averaged 93 on the same exam. What is the weighted mean For the 32 students taking the exam?

Listed below is the box plot of average earnings ratio for full-year, full-time male workers from 1999 To 2008: From this we can interpret that the range of average earnings for men for the years 1999-2008 was Approximately:

Using the information gathered for real estate prices in Regina and surrounding areas in the early 2000's, determine the mean of the selling prices at that time.

If a major sports star were to move into your neighbourhood, what would you expect to happen to The neighbourhood's "average" income?

What is a disadvantage of the range as a measure of dispersion?

(i. The range for laminate ﬂooring is 0 or none. (ii. The standard deviation for nylon carpet is 4.64 cents (iii) The range for nylon carpet is $0.12 or 12 cents.

What is a disadvantage of the range as a measure of dispersion?

Which one of the following is referred to as the population mean?

What Is Statistics

Describing Data: Frequencydistributions and Graphic Presentation

Describing Data: Displaying and Exploring Pata

A Sulvey of Probability Concepts

Discrete Probability Distributions

Continuous Probabilitydistributions

Sampling Methods and the Central Umit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Decision Making and Payoff Tables in Investment Scenarios

Filters

Exam 3: Describing Data: Numerical Measures

(i. The mode is 21. (ii. The arithmetic mean is 20.4. (iii) The median is 21.

(i. The mode is 21. (ii. The arithmetic mean is 20.4. (iii) The median is 23.

The ages of newly hired, unskilled employees were grouped into the following distribution: What is the median age?

(i. The range for laminate ﬂooring is 0 or none. (ii. The range for polyester carpet is $0.04 or 4 cents. (iii) The mean deviation for laminate ﬂooring is 0.

Fifteen accounting majors had an average grade of 90 on a ﬁnance exam. Seven marketing majors Averaged 85, while ten ﬁnance majors averaged 93 on the same exam. What is the weighted mean For the 32 students taking the exam?

Listed below is the box plot of average earnings ratio for full-year, full-time male workers from 1999 To 2008: From this we can interpret that the range of average earnings for men for the years 1999-2008 was Approximately:

Using the information gathered for real estate prices in Regina and surrounding areas in the early 2000's, determine the mean of the selling prices at that time.

If a major sports star were to move into your neighbourhood, what would you expect to happen to The neighbourhood's "average" income?

What is a disadvantage of the range as a measure of dispersion?

(i. The range for laminate ﬂooring is 0 or none. (ii. The standard deviation for nylon carpet is 4.64 cents (iii) The range for nylon carpet is $0.12 or 12 cents.

What is a disadvantage of the range as a measure of dispersion?

Which one of the following is referred to as the population mean?

What Is Statistics

Describing Data: Frequencydistributions and Graphic Presentation

Describing Data: Displaying and Exploring Pata

A Sulvey of Probability Concepts

Discrete Probability Distributions

Continuous Probabilitydistributions

Sampling Methods and the Central Umit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Decision Making and Payoff Tables in Investment Scenarios

Filters