Question 1

Which should not be regarded as a continuous random variable?

Accepted Answer

A) Tonnage carried by a randomly chosen oil tanker at sea 
B) Wind velocity at 7 o'clock this morning 
C) Number of personal fouls by the Miami Heat in a game 
D) Length of time to play a Wimbledon tennis match 
A) Tonnage carried by a randomly chosen oil tanker at sea 
B) Wind velocity at 7 o'clock this morning 
C) Number of personal fouls by the Miami Heat in a game 
D) Length of time to play a Wimbledon tennis match

Question 2

An accounting professor wishing to know how many MBA students would take a summer elective in international accounting did a survey of the class she was teaching. Which kind of sample is this?

Accepted Answer

A) Simple random sample 
B) Cluster sample 
C) Systematic sample 
D) Convenience sample 
A) Simple random sample 
B) Cluster sample 
C) Systematic sample 
D) Convenience sample

Question 3

Running times for 3,000 runners in a 5k race would be a multivariate data set.

Accepted Answer

A) True 
 B)False

Question 4

Comparing a census of a large population to a sample drawn from it, we expect that the:

Accepted Answer

A) sample is usually a more practical method of obtaining the desired information. 
B) accuracy of the observations in the census is surely higher than in the sample. 
C) sample must be a large fraction of the population to be accurate. 
A) sample is usually a more practical method of obtaining the desired information. 
B) accuracy of the observations in the census is surely higher than in the sample. 
C) sample must be a large fraction of the population to be accurate.

Question 5

Internet surveys posted on popular websites such as MSN.com suffer from nonresponse bias.

Accepted Answer

A) True 
 B)False

Question 6

The level of measurement for categorical data is nominal.

Accepted Answer

A) True 
 B)False

Question 7

Which statement is correct?

Accepted Answer

A) Analysts avoid business periodicals (e.g., Bloomberg Businessweek). 
B) Web searches (e.g., Google) yield reliable and easily verified data. 
C) Government data sources (e.g., www.bls.gov) usually are free. 
D) Private statistical databases (e.g., CRSP) usually are free. 
A) Analysts avoid business periodicals (e.g., Bloomberg Businessweek). 
B) Web searches (e.g., Google) yield reliable and easily verified data. 
C) Government data sources (e.g., www.bls.gov) usually are free. 
D) Private statistical databases (e.g., CRSP) usually are free.

Question 8

A multivariate data set contains:

Accepted Answer

A) more than two observations. 
B) more than two categorical variables. 
C) more than two variables. 
D) more than two levels of measurement. 
A) more than two observations. 
B) more than two categorical variables. 
C) more than two variables. 
D) more than two levels of measurement.

Question 9

Ratio data are distinguished from interval data by the presence of a zero reference point.

Accepted Answer

A) True 
 B)False

Question 10

Which statement is false?

Accepted Answer

A) Random dialing phone surveys have low response and are poorly targeted. 
B) Selection bias means that many respondents dislike the interviewer. 
C) Simple random sampling requires a list of the population. 
D) Web surveys are economical but suffer from nonresponse bias. 
A) Random dialing phone surveys have low response and are poorly targeted. 
B) Selection bias means that many respondents dislike the interviewer. 
C) Simple random sampling requires a list of the population. 
D) Web surveys are economical but suffer from nonresponse bias.

Question 11

Likert scales are especially important in opinion polls and marketing surveys.

Accepted Answer

A) True 
 B)False

Question 12

An advantage of convenience samples is that:

Accepted Answer

A) the required sample size is easier to calculate. 
B) sampling error can be reduced. 
C) computation of statistics is easier. 
D) they are often quicker and cheaper. 
A) the required sample size is easier to calculate. 
B) sampling error can be reduced. 
C) computation of statistics is easier. 
D) they are often quicker and cheaper.

Question 13

The Centers for Disease Control and Prevention (CDC) wants to estimate the average extra hospital stay that occurs when heart surgery patients experience postoperative atrial fibrillation. They divide the United States into nine regions. In each region, hospitals are selected at random within each hospital size group (small, medium, large). In each hospital, heart surgery patients are sampled according to known percentages by age group (under 50, 50 to 64, 65 and over) and gender (male, female). This procedure combines which sampling methods?

Accepted Answer

A) Systematic, simple random, and convenience 
B) Convenience, systematic, and judgment 
C) Cluster, stratified, and simple random 
D) Judgment, systematic, and simple random 
A) Systematic, simple random, and convenience 
B) Convenience, systematic, and judgment 
C) Cluster, stratified, and simple random 
D) Judgment, systematic, and simple random

Question 14

How would you design a study to see whether drivers using hands-free cell phones are distracted enough to slow their reactions to emergency situations? How would you collect data?

Accepted Answer

No observation of drivers (too dangerous

Question 15

The type of statistical test that we can perform is independent of the level of measurement of the variable of interest.

Accepted Answer

A) True 
 B)False

Question 16

The closing price of a stock is an example of ratio data.

Accepted Answer

A) True 
 B)False

Question 17

A manager chose two people from his team of eight to give an oral presentation because she felt they were representative of the whole team's views. What sampling technique did she use in choosing these two people?

Accepted Answer

A) Convenience 
B) Simple random 
C) Judgment 
D) Cluster 
A) Convenience 
B) Simple random 
C) Judgment 
D) Cluster

Question 18

Which statement is correct?

Accepted Answer

A) Judgment sampling is preferred to systematic sampling. 
B) Sampling without replacement introduces bias in our estimates of parameters. 
C) Cluster sampling is useful when strata characteristics are unknown. 
D) Focus groups usually work best without a moderator. 
A) Judgment sampling is preferred to systematic sampling. 
B) Sampling without replacement introduces bias in our estimates of parameters. 
C) Cluster sampling is useful when strata characteristics are unknown. 
D) Focus groups usually work best without a moderator.

Question 19

Explain the concept of a focus group. In what ways does a focus group resemble a survey? Why is a moderator desirable? What else is required to make a successful focus group?

Accepted Answer

Data collected in a focus group are rich

Question 20

Measurements from a sample are called:

Accepted Answer

A) statistics. 
B) inferences. 
C) parameters. 
D) variables. 
A) statistics. 
B) inferences. 
C) parameters. 
D) variables.

Which should not be regarded as a continuous random variable?

An accounting professor wishing to know how many MBA students would take a summer elective in international accounting did a survey of the class she was teaching. Which kind of sample is this?

Running times for 3,000 runners in a 5k race would be a multivariate data set.

Comparing a census of a large population to a sample drawn from it, we expect that the:

Internet surveys posted on popular websites such as MSN.com suffer from nonresponse bias.

The level of measurement for categorical data is nominal.

Which statement is correct?

A multivariate data set contains:

Ratio data are distinguished from interval data by the presence of a zero reference point.

Which statement is false?

Likert scales are especially important in opinion polls and marketing surveys.

An advantage of convenience samples is that:

How would you design a study to see whether drivers using hands-free cell phones are distracted enough to slow their reactions to emergency situations? How would you collect data?

The type of statistical test that we can perform is independent of the level of measurement of the variable of interest.

The closing price of a stock is an example of ratio data.

A manager chose two people from his team of eight to give an oral presentation because she felt they were representative of the whole team's views. What sampling technique did she use in choosing these two people?

Which statement is correct?

Explain the concept of a focus group. In what ways does a focus group resemble a survey? Why is a moderator desirable? What else is required to make a successful focus group?

Measurements from a sample are called:

Overview of Statistics

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters

Exam 2: Data Collection

Which should not be regarded as a continuous random variable?

An accounting professor wishing to know how many MBA students would take a summer elective in international accounting did a survey of the class she was teaching. Which kind of sample is this?

Running times for 3,000 runners in a 5k race would be a multivariate data set.

Comparing a census of a large population to a sample drawn from it, we expect that the:

Internet surveys posted on popular websites such as MSN.com suffer from nonresponse bias.

The level of measurement for categorical data is nominal.

Which statement is correct?

A multivariate data set contains:

Ratio data are distinguished from interval data by the presence of a zero reference point.

Which statement is false?

Likert scales are especially important in opinion polls and marketing surveys.

An advantage of convenience samples is that:

How would you design a study to see whether drivers using hands-free cell phones are distracted enough to slow their reactions to emergency situations? How would you collect data?

The type of statistical test that we can perform is independent of the level of measurement of the variable of interest.

The closing price of a stock is an example of ratio data.

A manager chose two people from his team of eight to give an oral presentation because she felt they were representative of the whole team's views. What sampling technique did she use in choosing these two people?

Which statement is correct?

Explain the concept of a focus group. In what ways does a focus group resemble a survey? Why is a moderator desirable? What else is required to make a successful focus group?

Measurements from a sample are called:

Overview of Statistics

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters