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1) Construct a 90% confidence interval for the population mean. In a recent study of 22 eighth graders, the mean number of hours per week that they watched television was 19.6 with a standard deviation of 5.8 hours.

Show your value for E and the confidence interval

2) A survey of 300 fatal accidents showed that 123 were alcohol related. Construct a 98% confidence interval for the proportion of fatal accidents that were alcohol related.

3 ) In a survey of 1037 adults from the United States aged 65 and older, 643 were concerned about getting the flu. Construct the 90% confidence interval for the population proportion.

Show your value for E and the confidence interval