Homework Section 1.5

Discuss a possible advantage of offering rewards or incentives to increase response rates. Are there any disadvantages? Discuss a possible advantage. A. A possible advantage of offering rewards or incentives to increase response rates is that the sample has a higher proportion of people that are interested in the reward or incentive than the population. B. A possible advantage of offering rewards or incentives to increase response rates is that respondents put more effort into completely and accurately answering the survey questions because they feel obligated. C. A possible advantage of offering rewards or incentives to increase response rates is that the monetary outlays the researchers need to make for the survey are lower. D. A possible advantage of offering rewards or incentives to increase response rates is that if the sponsor of the survey has a vested interest in the​ results, then the rewards or incentives add credibility to the survey.

A possible advantage of offering rewards or incentives to increase response rates is that respondents put more effort into completely and accurately answering the survey questions because they feel obligated.

Determine if there are any disadvantages. . A possible disadvantage of offering rewards or incentives to increase response rates is that people who would not normally participate in the survey actually do participate in the survey. B. There are no disadvantages of offering rewards or incentives to increase response rates. C. A possible disadvantage of offering rewards or incentives to increase response rates is that too many people selected for the sample respond to the survey. D. A possible disadvantage of offering rewards or incentives to increase response rates is that the people interested in the rewards or incentives differ from the population in some way that is important to the​ study, causing biased results.

A possible disadvantage of offering rewards or incentives to increase response rates is that the people interested in the rewards or incentives differ from the population in some way that is important to the​ study, causing biased results.

Suggest a remedy to the problem in question 4. - reword the question so that it is balanced - increase the sample size so that more people respond to the question - ask customers throughout the day on both weekdays and weekends

ask customers throughout the day on both weekdays and weekends

A polling organization conducts a study to estimate the percentage of households that has both parents sharing equally in household chores. It mails a questionnaire to 1180 randomly selected households across the United States and asks the head of each household if he or she has both parents sharing equally in household chores. Of the 1180 households​ selected, 23 responded. This survey design is flawed. Which of the following best describes the problem. - sampling bias - nonresponse bias - response bias

nonresponse bias

During every election in a particular​ region, pollsters conduct exit polls to help determine which candidate people voted for. During the most recent​ election, pollsters incorrectly predicted candidate A the winner over candidate B. When asked how this error could have​ happened, the pollsters cited interviewer error due to the fact that in some precincts that favored candidate B, interviewers were denied access to voters selected in the sample. ​Plus, the interviewers made many mistakes when recording the responses of the respondents. In​ addition, the method of selecting individuals to be interviewed led to selecting a lower proportion of female ​voters, and candidate B was favored by females. Explain which nonsampling errors led to the incorrect conclusion regarding the election. Select all nonsampling errors that led to the incorrect conclusion. - data-entry error is a nonsampling error that contributed to the incorrect conclusion because the errors in data processing favored candidate A - nonresponse bias is a nonsampling error that contributed to the incorrect conclusion because the individuals who were selected for polling were not able to respond voted differently than those who did respond to the polling. - nonsampling errors led to the incorrect conclusion in this case - interviewer error is a nonsampling error that contributed to the incorrect conclusion because the interviewers were not able to interview the voters of some precincts.

nonresponse bias is a nonsampling error that contributed to the incorrect conclusion because the individuals who were selected for polling but were not able to respond voted differently than those who did respond to the polling.

What is a possible remedy to question 10? - conduct face-to-face or telephone interviews - use systematic random sampling - reword the question

conduct face-to-face or telephone interviews

A polling organization conducts a study to estimate the percentage of households that speak a foreign language as the primary language. They mail a questionnaire to 1,023 randomly selected households and asks the head of household if a foreign language is the primary language spoken in the home. Of the 1,023 households selected, 12 responded. What is the type of bias? - response bias - nonresponse bias - sampling bias

nonresponse bias

An anti-smoking advocate wants to estimate the percentage of people who favor decreasing the use of advertising to sell cigarettes. She conducts a nationwide survey of 1050 randomly selected adults 18 years and older. The interviewer asks the​ respondents, "Do you favor higher health insurance premiums for smokers?" The survey has bias. Which of the following best describes the problem? - sampling bias - nonresponse bias - response bias

response bias

Suppose you are conducting a survey regarding illicit drug use among doctors in New York City. You obtain a cluster sample of 16 hospitals within New York City and sample all doctors in the randomly selected hospitals. The survey is administered by the hospital administration. The survey has bias. Which of the following best describes the problem? - response bias - sampling bias - nonresponse bias

response bias

What is nonresponse bias?

results when respondents differ in meaningful ways from nonrespondants. Nonresponse is often problem with mail surveys, where the response rate can be very low.

A health teacher wishes to do research on the weight of college students. She obtains the weights for all the students in her 9 A.M. class by looking at their drivers licenses or state ID's. What is the type of bias? - nonresponse bias - sampling bias - response bias

sampling bias

The manager of a shopping mall wishes to expand the number of shops available in the food court. He has a market researcher survey the first 120 customers who come into the food court during weekday afternoons to determine what types of food the shoppers would like to see added to the food court. The survey has bias. Determine whether the flaw is due to the sampling method or the survey itself. For biased surveys, identify the cause of the error. What is the cause of this bias? - response bias - nonresponse bias - sampling bias

sampling bias

What is response bias?

the tendency of a person to answer questions on a survey untruthfully or misleadingly. For example, they may feel pressure to give answers that are socially acceptable.

What is the possible remedy to question 8? - use systematic random sampling - reword the question - conduct face-to-face or telephone interviews

use systematic random sampling

What is sampling bias?

when a sample is created in such a way that some members of the intended population are less likely to be included than others.