Confidence interval for Mean & Proportion
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A market researcher for a consumer electronics company wants to study the television viewing habits of residents of a particular area. A random sample of 40 respondents is selected and each respondent is instructed to keep a detailed record of all television viewing in a particular week. The results are as follows:
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Viewing time per week :x = 15. 3 hours, S = 3.8 hours.
27 respondents watch the evening news on at least three week nigts.
A. construct a 95 % confidence interval estimate for the mean amount of television watched per wee in this area.
B. Construct a 95% confidence interval estimate for the population proportion who watch the eving news on a least 3 weeknights per week.
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Solution Summary
The solution provides step by step method for the calculation of confidence interval for mean and population proportion. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.
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