1. Construct the indicated confidence interval for the population mean using thet-distribution. Assume the population is normally distributed.

c=0.95, xbar=14.6, s=3.0, n=7

2. Construct the indicated confidence interval for the population mean using thet-distribution. Assume the population is normally distributed.

c=0.98, xbar=14.6, s=0.79, n= 18

3. In a random sample of 26 people, the mean commute time to work was 33.1 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use at-distribution to construct a 98% confidence interval for the population mean . What is the margin of error of ? Interpret the results.

The confidence interval for the population mean is

4. In a random sample of five people, the mean driving distance to work was 19.1 miles and the standard deviation was 5.7 miles. Assume the population is normally distributed and use thet-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results.

Identify the margin of error.

5. In a random sample of eleven cellphones, the mean full retail price was $446.00 and the standard deviation was $198.00. Assume the population is normally distributed and use thet-distribution to find the margin of error and construct a 99% confidence interval for the population mean . Interpret the results.

Identify the margin of error.

6.In a random sample of six mobiledevices, the mean repair cost was $70.00 and the standard deviation was $13.00. Assume the population is normally distributed and use at-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results.

The 95% confidence interval for the population mean is