A survey conducted by the American Automobile Association showed that a family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls resulted in a sample mean of $252.45 per day and a sample standard deviation of $76.00

a. Develop a 95% confidence interval estimate of the mean amount spent per day by a family of four visiting Niagara Falls (to 2 decimals). C

b. Based on the confidence interval from part (a), does it appear that the population mean amount spent per day by familles visiting Niagara Falls differs from the mean reported by the American Automobile Association?
According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by insurance. Sample results, consistent with the CNBC report, showed 19 of 208 vehicles were not covered by insurance.
a. What is the point estimate of the proportion of vehicles not covered by insurance (to 4 decimals)?
b. Develop a 99% confidence interval for the population proportion (to 4 decimals).
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