Question: Construct 90% and 99% confidence intervals for the population mean temperature of coffee sold in Example 2. a. Find t c and E for each

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

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

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

c. Interpret the results.

Example 2

You randomly select 16 coffee shops and measure the temperature of the coffee sold at each. The sample mean temperature is 162.0°F with a sample standard deviation of 10.0°F. Construct a 95% confidence interval for the population mean temperature of coffee sold. Assume the temperatures are approximately normally distributed.

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