2/3/2023-HW More Survey Bias
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Last updated over 2 years ago
11 questions
Required
1
The director of student life at a small college wants to know what percent of students eat regularly in the cafeteria. To find out, the director selects an SRS (simple random sample) of 300 students who live in the dorms.
What type of bias is present in this study and what is the likely direction of the bias?
The director of student life at a small college wants to know what percent of students eat regularly in the cafeteria. To find out, the director selects an SRS (simple random sample) of 300 students who live in the dorms.
What type of bias is present in this study and what is the likely direction of the bias?
Required
1
A news organization wants to know what percent of U.S. residents support a “pathway to citizenship” for people who live in the United States illegally. The news organization randomly selects registered voters for the survey.
What type of bias is present in this study and what is the likely direction of the bias?
A news organization wants to know what percent of U.S. residents support a “pathway to citizenship” for people who live in the United States illegally. The news organization randomly selects registered voters for the survey.
What type of bias is present in this study and what is the likely direction of the bias?
Required
1
A survey of drivers began by randomly sampling from all listed residential telephone numbers in the United States. Of 45,956 calls to these numbers, 5029 were completed. The goal of the survey was to estimate how far people drive, on average, per day.
What type of bias is present in this study and what is the likely direction of the bias?
A survey of drivers began by randomly sampling from all listed residential telephone numbers in the United States. Of 45,956 calls to these numbers, 5029 were completed. The goal of the survey was to estimate how far people drive, on average, per day.
What type of bias is present in this study and what is the likely direction of the bias?
Required
1
A total of 300 people participated in a free 12-week weight-loss course at a community health clinic. After one year, administrators emailed each of the 300 participants to see how much weight they had lost since the end of the course. Only 56 participants responded to the survey. The mean weight loss for this sample was 13.6 pounds.
What type of bias is present in this study and what is the likely direction of the bias?
A total of 300 people participated in a free 12-week weight-loss course at a community health clinic. After one year, administrators emailed each of the 300 participants to see how much weight they had lost since the end of the course. Only 56 participants responded to the survey. The mean weight loss for this sample was 13.6 pounds.
What type of bias is present in this study and what is the likely direction of the bias?
Required
1
A SRS of 880 drivers was asked: “Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?” Of the 880 respondents, 171 admitted that at least one light had been red.
What type of bias is present in this study and what is the likely direction of the bias?
A SRS of 880 drivers was asked: “Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?” Of the 880 respondents, 171 admitted that at least one light had been red.
What type of bias is present in this study and what is the likely direction of the bias?
Required
1
A study in El Paso, Texas, looked at seat belt use by drivers. Drivers were observed at randomly chosen convenience stores. After they left their cars, they were invited to answer questions that included questions about seat belt use. In all, 75% said they always used seat belts, yet only 61.5% were wearing seat belts when they pulled into the store parking lots.
What type of bias may be present in this study?
A study in El Paso, Texas, looked at seat belt use by drivers. Drivers were observed at randomly chosen convenience stores. After they left their cars, they were invited to answer questions that included questions about seat belt use. In all, 75% said they always used seat belts, yet only 61.5% were wearing seat belts when they pulled into the store parking lots.
What type of bias may be present in this study?
Required
1
Two female statistics students asked a random sample of 60 high school boys if they have ever cried during a movie. Thirty of the boys were asked directly and the other 30 were asked anonymously by means of a “secret ballot.” When the responses were anonymous, 63% of the boys said “Yes,” whereas only 23% of the group who was asked directly said “Yes.”
What type of bias may be present in this study?
Two female statistics students asked a random sample of 60 high school boys if they have ever cried during a movie. Thirty of the boys were asked directly and the other 30 were asked anonymously by means of a “secret ballot.” When the responses were anonymous, 63% of the boys said “Yes,” whereas only 23% of the group who was asked directly said “Yes.”
What type of bias may be present in this study?
Required
1
Marcos asked a random sample of 50 mall shoppers for their weight. Twenty-five of the shoppers were asked directly and the other 25 were asked anonymously by means of a “secret ballot.” The average reported weight was 13 pounds heavier for the anonymous group.
What type of bias may be present in this study?
Marcos asked a random sample of 50 mall shoppers for their weight. Twenty-five of the shoppers were asked directly and the other 25 were asked anonymously by means of a “secret ballot.” The average reported weight was 13 pounds heavier for the anonymous group.
What type of bias may be present in this study?
Required
1
Researchers used the telephone book to select people to be surveyed regarding city services.
What type of bias may be present in this study?
Researchers used the telephone book to select people to be surveyed regarding city services.
What type of bias may be present in this study?
Required
1
Wanting to survey alumni about their planned attendance at Homecoming, the planning committee sent out 5000 surveys to alumni. About 800 were returned.
What type of bias may be present in this study?
Wanting to survey alumni about their planned attendance at Homecoming, the planning committee sent out 5000 surveys to alumni. About 800 were returned.
What type of bias may be present in this study?
Required
1
Students were surveyed about how they felt about their school. They were required to provide their student id number on the survey, so the survey wasn't anonymous.
What type of bias may be present in this study?
Students were surveyed about how they felt about their school. They were required to provide their student id number on the survey, so the survey wasn't anonymous.
What type of bias may be present in this study?