The random sample shown below was selected from a normal distribution.
Complete parts
a. Construct a
b. Assume that sample mean
The confidence interval is (Round to two decimal places as needed)
Final Answer: The 99% confidence interval for the population mean
Step 1 :Given a random sample from a normal distribution:
Step 2 :Calculate the sample mean
Step 3 :The sample mean
Step 4 :Construct a 99% confidence interval for the population mean
Step 5 :The 99% confidence interval for the population mean
Step 6 :Assume that the sample mean
Step 7 :Repeat the calculation of the confidence interval with a sample size of 25
Step 8 :The 99% confidence interval for the population mean
Step 9 :Compare the results of the confidence intervals with sample sizes of 6 and 25
Step 10 :Increasing the sample size decreases the width of the confidence interval, making our estimate of the population mean more precise
Step 11 :Final Answer: The 99% confidence interval for the population mean