Questions: The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A polling organization conducts a study to estimate the percentage of households that speak a second language. It mails a questionnaire to 1331 randomly selected households across the country and asks the head of each household if he or she speaks a second language. Of the 1331 households selected, 29 responded. (a) Which of these best describes the bias in the survey? Undercoverage bias Nonresponse bias Response bias Sampling bias (b) How can the bias be remedied? A. The polling organization should mail the questionnaire to each person in the households. B. The polling organization should mail the questionnaire to a greater number of households. C. The polling organization should only select households in a single state. D. The polling organization should try contacting households that do not respond by phone or face-to-face.

The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy.
A polling organization conducts a study to estimate the percentage of households that speak a second language. It mails a questionnaire to 1331 randomly selected households across the country and asks the head of each household if he or she speaks a second language. Of the 1331 households selected, 29 responded.
(a) Which of these best describes the bias in the survey?
Undercoverage bias
Nonresponse bias
Response bias
Sampling bias
(b) How can the bias be remedied?
A. The polling organization should mail the questionnaire to each person in the households.
B. The polling organization should mail the questionnaire to a greater number of households.
C. The polling organization should only select households in a single state.
D. The polling organization should try contacting households that do not respond by phone or face-to-face.

Transcript text: The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A polling organization conducts a study to estimate the percentage of households that speak a second language. It mails a questionnaire to 1331 randomly selected households across the country and asks the head of each household if he or she speaks a second language. Of the 1331 households selected, 29 responded. (a) Which of these best describes the bias in the survey? Undercoverage bias Nonresponse bias Response bias Sampling bias (b) How can the bias be remedied? A. The polling organization should mail the questionnaire to each person in the households. B. The polling organization should mail the questionnaire to a greater number of households. C. The polling organization should only select households in a single state. D. The polling organization should try contacting households that do not respond by phone or face-to-face.

Solution

Solution Steps

Step 1: Identify the Type of Bias

Given the significant low response rate in the survey on 'estimate the percentage of households that speak a second language', the primary concern is identified as 'nonresponse bias'. This is consistent with the expected type of bias based on the survey's design and response pattern.

Step 2: Select an Appropriate Remedy

To mitigate the 'nonresponse bias', the following strategies are proposed based on the remedy options provided: The polling organization should try contacting households that do not respond by phone or face-to-face.. These strategies aim to increase the response rate and ensure a more representative sample of the population under study.

Step 3: Implement and Re-evaluate

After applying the chosen remedy, the survey's response rate and bias will be re-evaluated. If the response rate improves and the bias is significantly reduced, the approach is considered successful. Otherwise, alternative or additional remedies should be considered.

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