Question 1

Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. Find the weighted mean hourly wage.

Accepted Answer

A)  $8 
B)  $9 
C)  $12 
D)  $6 
E)  $10 
A)  $8 
B)  $9 
C)  $12 
D)  $6 
E)  $10 B

Question 2

A stockbroker placed the following order for a customer: -50 shares of Kaiser Aluminum preferred at $104 a share
-100 shares of GTE preferred at $25 1/4 a share
-20 shares of Boston Edison preferred at $9 1/8 a share
What is the weighted arithmetic mean price per share?

Accepted Answer

A)  $25.25 
B)  $79.75 
C)  $103.50 
D)  $42.75 
E)  None of the choices are correct. 
A)  $25.25 
B)  $79.75 
C)  $103.50 
D)  $42.75 
E)  None of the choices are correct. E

Question 3

What is the size of the sample?

Accepted Answer

A)  40 
B)  46 
C)  44.9 
D)  2595.9 
E)  None of the choices are correct. 
A)  40 
B)  46 
C)  44.9 
D)  2595.9 
E)  None of the choices are correct. A

Question 4

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)  None of the choices are correct. 
A)  89.84 
B)  89.33 
C)  89.48 
D)  Impossible to determine without more information 
E)  None of the choices are correct.

Question 5

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 
E)  None of the choices are correct. 
A)  -1 and +1 
B)  -3 and +3 
C)  0% and 100% 
D)  Unlimited values 
E)  None of the choices are correct.

Question 6

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 are the median earnings for women for the years 1999-2008?

Accepted Answer

A)  $27,000 
B)  $27,600 
C)  $27,900 
D)  $28,320 
E)  $28,600 
A)  $27,000 
B)  $27,600 
C)  $27,900 
D)  $28,320 
E)  $28,600

Question 7

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours

-The third quartile for the distribution of number of sales per hour is______ .

Accepted Answer

The answer of A telemarketing firm is monitoring the performance...

Question 8

A characteristic of the population is called a_________ .

Accepted Answer

The answer of A characteristic of the population is called...

Question 9

What are half of the observations always greater than?

Accepted Answer

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

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 first 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 sum of the differences between sample observations and the sample mean is

Accepted Answer

A)  Zero 
B)  The mean deviation 
C)  The range 
D)  The standard deviation 
E)  The mean 
A)  Zero 
B)  The mean deviation 
C)  The range 
D)  The standard deviation 
E)  The mean

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

If two sets of data are in different units, we can compare the dispersion by using___________.

Accepted Answer

coefficien

Question 14

The number of work stoppages in a highly industrialized region for selected months are: 6, 0, 10, 14, 8 and 0. What is the median number of stoppages?

Accepted Answer

A)  0 
B)  6 
C)  7 
D)  8 
E)  None of the choices are correct. 
A)  0 
B)  6 
C)  7 
D)  8 
E)  None of the choices are correct.

Question 15

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 _____________.

Accepted Answer

The answer of A small manufacturing company with 52 employees...

Question 16

The value that occurs most often in a set of data is called the________

Accepted Answer

The answer of The value that occurs most often in...

Question 17

If a set of observations contains an extreme value and none of the observations repeat themselves, the ________is the most representative measure of central tendency.

Accepted Answer

The answer of If a set of observations contains an...

Question 18

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

Accepted Answer

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

Question 19

Samples of the wires coming off the production line were tested for tensile strength. The statistical results (in PSI) were:   According to the Empirical Rule, the middle 95 percent of the wires tested between approximately what two values?

Accepted Answer

A)  450 and 550 
B)  460 and 540 
C)  420 and 580 
D)  380 and 620 
E)  None of the choices are correct. 
A)  450 and 550 
B)  460 and 540 
C)  420 and 580 
D)  380 and 620 
E)  None of the choices are correct.

Question 20

The ages of a sample of the typewriters used by the typists in the typing pool were organized into the following table:   What is the sample variance?

Accepted Answer

A)  About 10.2 
B)  About 6.1 
C)  About 14.0 
D)  About 3.2 
E)  None of the choices are correct. 
A)  About 10.2 
B)  About 6.1 
C)  About 14.0 
D)  About 3.2 
E)  None of the choices are correct.

Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. Find the weighted mean hourly wage.

A stockbroker placed the following order for a customer: -50 shares of Kaiser Aluminum preferred at $104 a share -100 shares of GTE preferred at $25 1/4 a share -20 shares of Boston Edison preferred at $9 1/8 a share What is the weighted arithmetic mean price per share?

What is the size of the sample?

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?

The coefficient of variation generally lies between what two values?

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 are the median earnings for women for the years 1999-2008?

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours -The third quartile for the distribution of number of sales per hour is______ .

A characteristic of the population is called a_________ .

What are half of the observations always greater than?

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

The sum of the differences between sample observations and the sample mean is

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

If two sets of data are in different units, we can compare the dispersion by using___________.

The number of work stoppages in a highly industrialized region for selected months are: 6, 0, 10, 14, 8 and 0. What is the median number of stoppages?

The value that occurs most often in a set of data is called the________

If a set of observations contains an extreme value and none of the observations repeat themselves, the ________is the most representative measure of central tendency.

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

Samples of the wires coming off the production line were tested for tensile strength. The statistical results (in PSI) were: According to the Empirical Rule, the middle 95 percent of the wires tested between approximately what two values?

The ages of a sample of the typewriters used by the typists in the typing pool were organized into the following table: What is the sample variance?

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

Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. Find the weighted mean hourly wage.

A stockbroker placed the following order for a customer: -50 shares of Kaiser Aluminum preferred at $104 a share -100 shares of GTE preferred at $25 1/4 a share -20 shares of Boston Edison preferred at $9 1/8 a share What is the weighted arithmetic mean price per share?

What is the size of the sample?

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?

The coefficient of variation generally lies between what two values?

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 are the median earnings for women for the years 1999-2008?

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours -The third quartile for the distribution of number of sales per hour is______ .

A characteristic of the population is called a_________ .

What are half of the observations always greater than?

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

The sum of the differences between sample observations and the sample mean is

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

If two sets of data are in different units, we can compare the dispersion by using___________.

The number of work stoppages in a highly industrialized region for selected months are: 6, 0, 10, 14, 8 and 0. What is the median number of stoppages?

The value that occurs most often in a set of data is called the________

If a set of observations contains an extreme value and none of the observations repeat themselves, the ________is the most representative measure of central tendency.

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

Samples of the wires coming off the production line were tested for tensile strength. The statistical results (in PSI) were: According to the Empirical Rule, the middle 95 percent of the wires tested between approximately what two values?

The ages of a sample of the typewriters used by the typists in the typing pool were organized into the following table: What is the sample variance?

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