Question 1

Telephone surveys often have a low response rate and fail to reach the desired population.

Accepted Answer

A) True 
 B)False

Question 2

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 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Don't use direct observation of drivers

Question 5

A problem with convenience sampling is that the target population is not well-defined.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is false?

Accepted Answer

A) Sampling error is the difference between the true parameter and the sample estimate. 
B) Sampling error is a result of unavoidable random variation in a sample. 
C) A sampling frame is chosen from the target population in a statistical study. 
D) The target population must first be defined by a full list or data file of all individuals. 
A) Sampling error is the difference between the true parameter and the sample estimate. 
B) Sampling error is a result of unavoidable random variation in a sample. 
C) A sampling frame is chosen from the target population in a statistical study. 
D) The target population must first be defined by a full list or data file of all individuals.

Question 7

Categorical data have values that are described by words rather than numbers.

Accepted Answer

A) True 
 B)False

Question 8

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 9

From its 32 regions,the FAA selects 6 regions,and then randomly audits 25 departing commercial flights in each region for compliance with legal fuel and weight requirements.This is an example of

Accepted Answer

A) simple random sampling. 
B) stratified random sampling. 
C) cluster sampling. 
D) judgment sampling. 
A) simple random sampling. 
B) stratified random sampling. 
C) cluster sampling. 
D) judgment sampling.

Question 10

Which variable is least likely to be regarded as ratio data?

Accepted Answer

A) Length of time required for a randomly chosen vehicle to cross a toll bridge (minutes) 
B) Weight of a randomly chosen student (pounds) 
C) Number of fatalities in a randomly chosen traffic disaster (persons) 
D) Student's evaluation of a professor's teaching (Likert scale) 
A) Length of time required for a randomly chosen vehicle to cross a toll bridge (minutes) 
B) Weight of a randomly chosen student (pounds) 
C) Number of fatalities in a randomly chosen traffic disaster (persons) 
D) Student's evaluation of a professor's teaching (Likert scale)

Question 11

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 12

The number of FedEx shipping centers in each of 50 cities would be ordinal level data.

Accepted Answer

A) True 
 B)False

Question 13

The Statistical Abstract of the United States is a huge annual compendium of data for the United States,and it is available online free of charge.

Accepted Answer

A) True 
 B)False

Question 14

Each row in a multivariate data matrix is an observation (e.g. ,an individual response).

Accepted Answer

A) True 
 B)False

Question 15

A worker collecting data from every other shopper who leaves a store on Monday during the noon hour is taking a random sample of customer opinion.

Accepted Answer

A) True 
 B)False

Question 16

Different variables are usually shown as columns of a multivariate data set.

Accepted Answer

A) True 
 B)False

Question 17

Which is most nearly correct regarding sampling error?

Accepted Answer

A) It can be eliminated by increasing the sample size. 
B) It cannot be eliminated by any statistical sampling method. 
C) It can be eliminated by using Excel's =RANDBETWEEN()function. 
D) It can be eliminated by utilizing systematic random sampling. 
A) It can be eliminated by increasing the sample size. 
B) It cannot be eliminated by any statistical sampling method. 
C) It can be eliminated by using Excel's =RANDBETWEEN()function. 
D) It can be eliminated by utilizing systematic random sampling.

Question 18

Which method is likely to be used by a journalism student who is casually surveying opinions of students about the university's cafeteria food for an article that she is writing?

Accepted Answer

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

Question 19

Temperature measured in degrees Fahrenheit is an example of interval data.

Accepted Answer

A) True 
 B)False

Question 20

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.

Telephone surveys often have a low response rate and fail to reach the desired population.

Which statement is false?

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

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?

A problem with convenience sampling is that the target population is not well-defined.

Which of the following is false?

Categorical data have values that are described by words rather than numbers.

An advantage of convenience samples is that

From its 32 regions,the FAA selects 6 regions,and then randomly audits 25 departing commercial flights in each region for compliance with legal fuel and weight requirements.This is an example of

Which variable is least likely to be regarded as ratio data?

Which should not be regarded as a continuous random variable?

The number of FedEx shipping centers in each of 50 cities would be ordinal level data.

The Statistical Abstract of the United States is a huge annual compendium of data for the United States,and it is available online free of charge.

Each row in a multivariate data matrix is an observation (e.g. ,an individual response).

A worker collecting data from every other shopper who leaves a store on Monday during the noon hour is taking a random sample of customer opinion.

Different variables are usually shown as columns of a multivariate data set.

Which is most nearly correct regarding sampling error?

Which method is likely to be used by a journalism student who is casually surveying opinions of students about the university's cafeteria food for an article that she is writing?

Temperature measured in degrees Fahrenheit is an example of interval data.

Which statement is correct?

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

Chi-Square Tests

Filters

Exam 2: Data Collection

Telephone surveys often have a low response rate and fail to reach the desired population.

Which statement is false?

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

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?

A problem with convenience sampling is that the target population is not well-defined.

Which of the following is false?

Categorical data have values that are described by words rather than numbers.

An advantage of convenience samples is that

From its 32 regions,the FAA selects 6 regions,and then randomly audits 25 departing commercial flights in each region for compliance with legal fuel and weight requirements.This is an example of

Which variable is least likely to be regarded as ratio data?

Which should not be regarded as a continuous random variable?

The number of FedEx shipping centers in each of 50 cities would be ordinal level data.

The Statistical Abstract of the United States is a huge annual compendium of data for the United States,and it is available online free of charge.

Each row in a multivariate data matrix is an observation (e.g. ,an individual response).

A worker collecting data from every other shopper who leaves a store on Monday during the noon hour is taking a random sample of customer opinion.

Different variables are usually shown as columns of a multivariate data set.

Which is most nearly correct regarding sampling error?

Which method is likely to be used by a journalism student who is casually surveying opinions of students about the university's cafeteria food for an article that she is writing?

Temperature measured in degrees Fahrenheit is an example of interval data.

Which statement is correct?

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

Chi-Square Tests

Filters