Constructing Confidence Intervals In Exercises 35-37, you are given the sample mean and the population standard deviation. Use this information to construct 95% confidence interval for the population mean. Interpret the results and compare the widths of the confidence intervals.
Gold Prices From a random sample of 48 business days from January 4, 2010, through February 24, 2017, U.S. gold prices had a mean of $1368.48. Assume the population standard deviation is $202.60.
Maximum Daily Temperature From a random sample of 64 dates, the mean record high daily temperature in the Chicago, Illinois, area has a mean of 84.13°F. Assume the population standard deviation is 14.56°F.