Question 1

What is the median of 26, 30, 24, 32, 32, 31, 27 and 29?

Accepted Answer

A)  32 
B)  29 
C)  30 
D)  29.5 
E)  None of the choices are correct. 
A)  32 
B)  29 
C)  30 
D)  29.5 
E)  None of the choices are correct.

Question 2

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical Rule, about 95 percent of the monthly food expenditures are between what two amounts?

Accepted Answer

A)  $100 and $200 
B)  $85 and $105 
C)  $205 and $220 
D)  $110 and $190 
E)  None of the choices are correct. 
A)  $100 and $200 
B)  $85 and $105 
C)  $205 and $220 
D)  $110 and $190 
E)  None of the choices are correct.

Question 3

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 4

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)  None of the choices are correct. 
A)  About 4 
B)  About 16 
C)  About 100 
D)  About 40 
E)  None of the choices are correct.

Question 5

The net sales of a sample of small stamping plants were organized into the following percent frequency distribution.   What is the mean net sales (in $millions)?

Accepted Answer

A)  $7.09 
B)  $10.09 
C)  $8.59 
D)  $8.325 
E)  Mean cannot be computed 
A)  $7.09 
B)  $10.09 
C)  $8.59 
D)  $8.325 
E)  Mean cannot be computed

Question 6

What must be the least scale of measurement for the median?

Accepted Answer

A)  Nominal 
B)  Ordinal 
C)  Interval 
D)  Ratio 
E)  None of the choices are correct. 
A)  Nominal 
B)  Ordinal 
C)  Interval 
D)  Ratio 
E)  None of the choices are correct.

Question 7

If a frequency distribution has open-ended intervals at the extremes, which measure of central tendency is the most difficult to estimate?

Accepted Answer

A)  Median 
B)  Mode 
C)  Mean 
D)  All of the choices are correct. 
E)  None of the choices are correct. 
A)  Median 
B)  Mode 
C)  Mean 
D)  All of the choices are correct. 
E)  None of the choices are correct.

Question 8

The coefficient of variation is a measure of ___________.

Accepted Answer

The answer of The coefficient of variation is a measure...

Question 9

The______ is the measure of central tendency that uses all of the observations in its calculation.

Accepted Answer

The answer of The______ is the measure of central tendency...

Question 10

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 third quartile of average earnings for women for the years 1999-
2008 was approximately:

Accepted Answer

A)  $27,600 
B)  $27,900 
C)  $28,500 
D)  $28,900 
E)  $30,200 
A)  $27,600 
B)  $27,900 
C)  $28,500 
D)  $28,900 
E)  $30,200

Question 11

The standard deviation the positive square root of the_______ .

Accepted Answer

The answer of The standard deviation the positive square root...

Question 12

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 
E)  None of the choices are correct. 
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 
E)  None of the choices are correct.

Question 13

In the calculation of the arithmetic mean for grouped data, which value is used to represent all the values in a particular class?

Accepted Answer

A)  The upper limit of the class 
B)  The lower limit of the class 
C)  The frequency of the class 
D)  The cumulative frequency preceding the class 
E)  None of the choices are correct. 
A)  The upper limit of the class 
B)  The lower limit of the class 
C)  The frequency of the class 
D)  The cumulative frequency preceding the class 
E)  None of the choices are correct.

Question 14

What statistics are needed to draw a box plot?

Accepted Answer

A)  Minimum, maximum, median, first and third quartiles 
B)  Median, mean and standard deviation 
C)  A mean and dispersion 
D)  A mean and a standard deviation 
E)  Q1, Q2 and Q3 
A)  Minimum, maximum, median, first and third quartiles 
B)  Median, mean and standard deviation 
C)  A mean and dispersion 
D)  A mean and a standard deviation 
E)  Q1, Q2 and Q3

Question 15

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 do not 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 16

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. The food resulting in a more uniform weight is_______.

Accepted Answer

The answer of Rainbow Trout, Inc., feeds fingerling trout in...

Question 17

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 variance is approximately ______.

Accepted Answer

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

Question 18

Below is a summary of the size of homes for sale in Regina in 2005.
The Empirical Rule would suggest that the middle 68% of the home sizes are between what two
approximate values?

Accepted Answer

A)  1,000 to 2,000 sq. ft. 
B)  892 to 2,534 sq ft. 
C)  71 to 3,355 sq ft. 
D)  0 to 4,176 sq ft. 
E)  None of the choices are correct. 
A)  1,000 to 2,000 sq. ft. 
B)  892 to 2,534 sq ft. 
C)  71 to 3,355 sq ft. 
D)  0 to 4,176 sq ft. 
E)  None of the choices are correct.

Question 19

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

Accepted Answer

A)  $188,330 
B)  $200,000 
C)  $125,000 
D)  $175,000 
E)  $195,600 
A)  $188,330 
B)  $200,000 
C)  $125,000 
D)  $175,000 
E)  $195,600

Question 20

i. Chebyshev's theorem states that about 68% of the observation will lie within one standard deviation of the mean;
Ii) About 95% of the observations will lie within two standard deviations of the mean;
Iii) Virtually all (99.7%) will lie within three standard deviations of the 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

What is the median of 26, 30, 24, 32, 32, 31, 27 and 29?

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical Rule, about 95 percent of the monthly food expenditures are between what two amounts?

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:

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)?

The net sales of a sample of small stamping plants were organized into the following percent frequency distribution. What is the mean net sales (in $millions)?

What must be the least scale of measurement for the median?

If a frequency distribution has open-ended intervals at the extremes, which measure of central tendency is the most difficult to estimate?

The coefficient of variation is a measure of ___________.

The______ is the measure of central tendency that uses all of the observations in its calculation.

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 third quartile of average earnings for women for the years 1999- 2008 was approximately:

The standard deviation the positive square root of the_______ .

What do the quartile deviation and the interquartile range describe?

In the calculation of the arithmetic mean for grouped data, which value is used to represent all the values in a particular class?

What statistics are needed to draw a box plot?

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 do not affect the value of the median. iii. There are always as many values above the mean as below it.

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 variance is approximately ______.

Below is a summary of the size of homes for sale in Regina in 2005. The Empirical Rule would suggest that the middle 68% of the home sizes are between what two approximate values?

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

i. Chebyshev's theorem states that about 68% of the observation will lie within one standard deviation of the mean; Ii) About 95% of the observations will lie within two standard deviations of the mean; Iii) Virtually all (99.7%) will lie within three standard deviations of the mean.

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

What is the median of 26, 30, 24, 32, 32, 31, 27 and 29?

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical Rule, about 95 percent of the monthly food expenditures are between what two amounts?

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:

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)?

The net sales of a sample of small stamping plants were organized into the following percent frequency distribution. What is the mean net sales (in $millions)?

What must be the least scale of measurement for the median?

If a frequency distribution has open-ended intervals at the extremes, which measure of central tendency is the most difficult to estimate?

The coefficient of variation is a measure of ___________.

The______ is the measure of central tendency that uses all of the observations in its calculation.

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 third quartile of average earnings for women for the years 1999- 2008 was approximately:

The standard deviation the positive square root of the_______ .

What do the quartile deviation and the interquartile range describe?

In the calculation of the arithmetic mean for grouped data, which value is used to represent all the values in a particular class?

What statistics are needed to draw a box plot?

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 do not affect the value of the median. iii. There are always as many values above the mean as below it.

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 variance is approximately ______.

Below is a summary of the size of homes for sale in Regina in 2005. The Empirical Rule would suggest that the middle 68% of the home sizes are between what two approximate values?

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

i. Chebyshev's theorem states that about 68% of the observation will lie within one standard deviation of the mean; Ii) About 95% of the observations will lie within two standard deviations of the mean; Iii) Virtually all (99.7%) will lie within three standard deviations of the mean.

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