construct a 95% confidence interval estimate for the mean amount of television watched per week in this area

2) A market researcher for a consumer electronics company wants to study the television viewing habits of residents in 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 population standard deviation (sigma) is unknown.The results are as follows:– viewing time per week:x-bar=15.3 hours, S=3.8 hours– 27 respondents watch the evening news on at least three week nights d) construct a 95% confidence interval estimate for the mean amount of television watched per week in this area) construct a 95% confidence interval estimate for the population proportion who watch the evening news on at least three weeknights per week