1. Construct 90% and 99% confidence intervals for the population mean temperature of coffee sold in Example 2. a. Find tc and E for each level of confidence. b. Use x and E to find the left and right...

1. Construct 90% and 99% confidence intervals for the population mean temperature of coffee sold in Example 2.

a. Find tc and E for each level of confidence.

b. Use x and E to find the left and right endpoints of each confidence interval.

c. Interpret the results.

2. Constructing a Confidence Interval You randomly select 36 cars of the same model that were sold at a

car dealership and determine the number of days each car sat on the dealership’s lot before it was sold. The sample mean is 9.75 days, with a sample standard deviation of 2.39 days. Construct a 99% confidence interval for the population mean number of days the car model sits on the dealership’s lot.