need help on statistics problem please 1. Which type of bias do you think would

Question

need help on statistics problem please

1. Which type of bias do you think would be introduced in each of the following situations? a. Response bias b. Selection bias C. Non-response bias A survey asked unmarried men, "What is the most important feature you consider when deciding to date somebody?" The results depended on the gender of the interviewer. Investigators randomly selected a sample of households during daytime hours in the middle of the week and surveyed a woman from each house. If no woman was present (usually because she was working), the reviewers skipped the house and went next door to try the neighbor's house. immigrants merit amnesty upon societal amalgamation?" lesbians serve openly?" Visitors could click their response and view the results. Interviewers stop shoppers at El Mercado Barato in Bisbee Arizona to ask "Do you believe US inbound In February 2010 the CNN website had a "Quick Vote" that asked, "Should the U.S. military let gays and

Explanation / Answer

Q.1

(a) Selection Bias - as depends on the respodent

(b) Non - response Bias - as houses are skipped which are not available for survey.

(c) Response Bias - as on critical issue, people generally give biased response.

(d) Selection bias - As only internet users and those who are urgently aware are able to vote.

Question2

(a) Stratified sampling - As population is divided into three groups (strata) as per their character and then surveryed.

(b) Cluster sampling - A cluster of 10 cities are selected and all the members are surveyd .

(c) Systematic sampling - A system is derived by making a fixed point.

Question 3

(a) Observational - No experiment is performed and data is solely collected only by observation.

(b) Experimental study - an experiment is done by meeting 1 to 2 hours per week,

(c) Observational study - there is no experiment just observation into three groups when students fo daily, weekly and on before exams.

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