Question 1

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 
A)  5.43 kg 
B)  6.25 kg 
C)  0.53 kg 
D)  52.50 kg

Question 2

A population consists of all the weights of all defensive tackles on Sociable University's football
Team. They are: Johnson, 204 pounds; Patrick, 215 pounds; Junior, 207 pounds; Kendron, 212
Pounds; Nicko, 214 pounds; and Cochran, 208 pounds. What is the population standard deviation
(in pounds)?

Accepted Answer

A)  About 4 
B)  About 16 
C)  About 100 
D)  About 40 
E)  Zero 
A)  About 4 
B)  About 16 
C)  About 100 
D)  About 40 
E)  Zero

Question 3

What is the relationship between the variance and the standard deviation?

Accepted Answer

A)  Variance is the square root of the standard deviation 
B)  Variance is the square of the standard deviation 
C)  Variance is twice the standard deviation 
D)  No constant relationship between the variance and the standard deviation 
A)  Variance is the square root of the standard deviation 
B)  Variance is the square of the standard deviation 
C)  Variance is twice the standard deviation 
D)  No constant relationship between the variance and the standard deviation

Question 4

(i. The range for laminate ﬂooring is 0 or none.
(ii. The mean deviation for laminate ﬂooring is 0.
(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 5

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 ﬁrst quartile of average earnings for men for the years 1999-
2008 was approximately:

Accepted Answer

A)  $44,000 
B)  $44,400 
C)  $44,800 
D)  $45,600 
E)  $46,900 
A)  $44,000 
B)  $44,400 
C)  $44,800 
D)  $45,600 
E)  $46,900

Question 6

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 7

The means differ vastly. 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. Determine the coeﬃcient of variation for each ﬁrm.

Accepted Answer

A)  Elly's Industries=17, Unique =19 
B)  Elly's Industries=19, Unique =17 
C)  Elly's Industries=16, Unique =18 
D)  Elly's Industries=18, Unique =17 
A)  Elly's Industries=17, Unique =19 
B)  Elly's Industries=19, Unique =17 
C)  Elly's Industries=16, Unique =18 
D)  Elly's Industries=18, Unique =17

Question 8

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 
A)  Based on only two observations 
B)  Based on deviations from the mean 
C)  Uses absolute values, which are diﬃcult to manipulate

Question 9

(i. If two sets of data are in different units, we can compare the dispersion by using coeﬃcient of
Variation.
(ii. A sample of the homes currently offered for sale revealed that the mean asking price is $75,900,
The median $70,100 and the modal price is $67,200. The standard deviation of the distribution is
$5,900. The Pearson's coeﬃcient of skewness is 3.95
(iii) The coeﬃcient of variation is a measure of relative dispersion.

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 10

The coeﬃcient of variation generally lies between what two values?

Accepted Answer

A)  - 1 and + 1 
B)  - 3 and + 3 
C)  0% and 100% 
D)  Unlimited values 
A)  - 1 and + 1 
B)  - 3 and + 3 
C)  0% and 100% 
D)  Unlimited values

Question 11

What do the quartile deviation and the interquartile range describe?

Accepted Answer

A)  Lower 50% of the observations 
B)  Middle 50% of the observations 
C)  Upper 50% of the observations 
D)  Lower 25% and the upper 25% of the observations 
A)  Lower 50% of the observations 
B)  Middle 50% of the observations 
C)  Upper 50% of the observations 
D)  Lower 25% and the upper 25% of the observations

Question 12

(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. The Pearson's coeﬃcient of skewness (Sk) measures the amount of skewness and may range
From -3.0 to +3.0. It is computed by subtracting the median from the mean, multiplying the result by
3 and dividing by standard deviation.
(iii) A study has been made of the number of hours a light bulb will operate before it burns out. If the
Variance 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 13

A disadvantage of using an arithmetic mean to summarize a set of data is

Accepted Answer

A)  It can be used for ratio data. 
B)  It is always different from the median. 
C)  It can be biased by one or two extremely small or large values. 
D)  The arithmetic mean sometimes has two values. 
A)  It can be used for ratio data. 
B)  It is always different from the median. 
C)  It can be biased by one or two extremely small or large values. 
D)  The arithmetic mean sometimes has two values.

Question 14

(i. Based on the values of the arithmetic mean, median, and mode, the distribution is most likely
Symmetrical.
(ii. The arithmetic mean is 24.0.
(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.

Question 15

Listed below is the box plot of average earnings ratio for full-year, full-time female workers from
1999 to 2008:  
From this we can interpret that the range of average earnings for women for the years 1999-2008
Was approximately:

Accepted Answer

A)  $27,600 
B)  $27,900 
C)  $28,900 
D)  $30,200 
E)  $3,200 
A)  $27,600 
B)  $27,900 
C)  $28,900 
D)  $30,200 
E)  $3,200

Question 16

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 17

Listed below is the average earnings ratio by sex for full-year, full-time workers from 1999 to 2008.
(Source: Adapted from Statistics Canada-see Connect for data ﬁle.)  
What were the modal earnings for men for the years 1999-2008?

Accepted Answer

A)  $43,000 
B)  $44,400 
C)  $44,500 
D)  $44,600 
E)  $44,700 
A)  $43,000 
B)  $44,400 
C)  $44,500 
D)  $44,600 
E)  $44,700

Question 18

The information below shows the summary statistics of data adapted from Statistics Canada,
Regarding gasoline prices from urban cities across Canada.  
(i. This data is based on values from 17 cities.
(ii. The average gas price in 2013 across the country based on this sample was $1.2356
(iii) 50% of the cities reported average gas prices over $1.23 per litre

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 19

i. The sum of the deviations from the mean for the set of numbers 4, 9 and 5 will equal zero.
ii. If there is an even number of ungrouped values, the median is found by arranging them from low
To high and then determining the arithmetic mean of the two middle values.
iii. For salaries of $102,000, $98,000, $35,000, $106,000 and $101,000, the arithmetic mean would
Be an appropriate average.

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 20

A sample of the daily number of passengers per bus riding the Bee Line commuter route yielded
The following information:  
What is the standard deviation?

Accepted Answer

A)  About 6.06 
B)  About 20.0 
C)  About 12.9 
D)  About 2.3 
A)  About 6.06 
B)  About 20.0 
C)  About 12.9 
D)  About 2.3

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?

A population consists of all the weights of all defensive tackles on Sociable University's football Team. They are: Johnson, 204 pounds; Patrick, 215 pounds; Junior, 207 pounds; Kendron, 212 Pounds; Nicko, 214 pounds; and Cochran, 208 pounds. What is the population standard deviation (in pounds)?

What is the relationship between the variance and the standard deviation?

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

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 ﬁrst quartile of average earnings for men for the years 1999- 2008 was approximately:

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

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

The coeﬃcient of variation generally lies between what two values?

What do the quartile deviation and the interquartile range describe?

A disadvantage of using an arithmetic mean to summarize a set of data is

(i. Based on the values of the arithmetic mean, median, and mode, the distribution is most likely Symmetrical. (ii. The arithmetic mean is 24.0. (iii) The median is 21.

Listed below is the box plot of average earnings ratio for full-year, full-time female workers from 1999 to 2008: From this we can interpret that the range of average earnings for women for the years 1999-2008 Was approximately:

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?

Listed below is the average earnings ratio by sex for full-year, full-time workers from 1999 to 2008. (Source: Adapted from Statistics Canada-see Connect for data ﬁle.) What were the modal earnings for men for the years 1999-2008?

A sample of the daily number of passengers per bus riding the Bee Line commuter route yielded The following information: What is the standard deviation?

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

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?

A population consists of all the weights of all defensive tackles on Sociable University's football Team. They are: Johnson, 204 pounds; Patrick, 215 pounds; Junior, 207 pounds; Kendron, 212 Pounds; Nicko, 214 pounds; and Cochran, 208 pounds. What is the population standard deviation (in pounds)?

What is the relationship between the variance and the standard deviation?

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

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 ﬁrst quartile of average earnings for men for the years 1999- 2008 was approximately:

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

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

The coeﬃcient of variation generally lies between what two values?

What do the quartile deviation and the interquartile range describe?

A disadvantage of using an arithmetic mean to summarize a set of data is

(i. Based on the values of the arithmetic mean, median, and mode, the distribution is most likely Symmetrical. (ii. The arithmetic mean is 24.0. (iii) The median is 21.

Listed below is the box plot of average earnings ratio for full-year, full-time female workers from 1999 to 2008: From this we can interpret that the range of average earnings for women for the years 1999-2008 Was approximately:

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?

Listed below is the average earnings ratio by sex for full-year, full-time workers from 1999 to 2008. (Source: Adapted from Statistics Canada-see Connect for data ﬁle.) What were the modal earnings for men for the years 1999-2008?

A sample of the daily number of passengers per bus riding the Bee Line commuter route yielded The following information: What is the standard deviation?

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