7.30 Using the Internet on a computer. The Nielsen Company reported that U.S. residents aged 18 to 24 years spend an average of 32.5 hours per month using the Internet on a computer.¹³ You wonder if this it true for students at your large university because so many students use their smartphones to access the Internet. You collect an SRS of students and obtain hours with hours.

1. (a) Report the 95% confidence interval for μ, the average number of hours per month that students at your university use the Internet on a computer.

2. (b) Use this interval to test whether the average time for students at your university is different from the average reported by Nielsen. Use the 5% significance level. Summarize your results.