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Question: In 2005,34% of workers reported that their jobs were more difficult,with more stress,and 37% reported that they worry about retiring comfortably. Consider a follow-up study to be conducted in the near future.
(a) What sample size is needed to estimate the population proportion of workers who reported that their jobs were more stress,to within +/- 0.02 with 95% confidence?
(b) How many workers need to be sampled in order to estimate the population proportion of workers who worried about retiring comfortably to within +/- 0.02 with 95% confidence?
(c) Compare the results of(a) and (b).Explain why these results differ.
(d) If you were to design the follow-up study, would you use one sample and ask the respondents both questions, or would you select two separate samples? Explain the rationale behind your decision.
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