7.16 Using an app or the Web on a smartphone. The Nielsen Company reports that U.S. residents aged 18 to. 34 years spend an average of 2.83 hours per day using an app or the Web on a smartphone. You...

Extracted text: 7.16 Using an app or the Web on a smartphone. The Nielsen Company reports that U.S. residents aged 18 to. 34 years spend an average of 2.83 hours per day using an app or the Web on a smartphone. You wonder if this it true for students at your large university because you rarely see students not using their smartphones. You collect an SRS of n = 75 students and obtain = 3.17 hours with s=1.36 hours. 15


Extracted text: (a) Report the 95% confidence interval for µ, the avera number of hours per month that students at your university use the Internet on a computer. (b) Use this interval to test whether the average time fo students at your university is different from the averag reported by Nielsen. Use the 5% significance level. Summarize your results.