The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A pol

Question

The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A polling organization conducts a study to estimate the peroantage of households that speak a second language. It mails a questionnaire to 1398 randomly selected households across the country and asks the head of each household if he or she speaks a second language. Of the 1398 households selected, 42 responded (a) Which of these best describes the bias in the survey? O Nonresponse bias O Sampling bias O Response bias O Undercoverage bias (b) How can the bias be remedied? 0 A. The polling organization should mail the questionnaire to each person in the households. B. The polling organization should only select households in a single state ° C. The polling organization should try contacting households that do not respond by phone or face-to-face. O D. The polling organization should mail the questionnaire to a greater number of households.

Explanation / Answer

a) Since the number of responses received are very less, there would be nonresponse bias.

Option A is correct.

b) Option C is correct.

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