Confidence interval for mean
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A market research for a consumer electronics company studied television viewing habits residents an area. A random sample 40 respondents selected, respondent instructed a detailed record television viewing a week. The results follows: Viewing time week :X=15.3 hours, S = 3.8 hours. 27 respondents watch evening news a t weeknights.
A. Construct a 95% confidence interval estimate for the mean amount of television watched per week in this area.
B. Construct a 95% confidence interval estimate for the population proportion who watch the evening news on at least 3 weeknights per week.
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Solution Summary
Step by step method for computing confidence interval for mean.
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