We Are Social and Hootsuite reported that the typical American spends 2.02 hours (121 minutes: per day accessing the Internet via mobile devices. Source: Digital in 2017 Global Overview, available at...

We Are Social and Hootsuite reported that the typical American spends 2.02 hours (121 minutes: per day accessing the Internet via mobile devices.

Source: Digital in 2017 Global Overview, available at bit.ly/2jXeS3F.

In order to test the validity of this statement, you select a sample of 30 friends and family. The results for the time spent per day accessing the Internet via mobile devices (in minutes: are stored in InternetMobileTime .

a. Is there evidence that the population mean time spent per day accessing the Internet via mobile devices is different from 121 minutes? Use the p-value approach and a level of significance of 0.05.

b. What assumption about the population distribution is needed in order to conduct the t test in (a:?

c. Make a list of the various ways you could evaluate the assumption noted in (b:.

d. Evaluate the assumption noted in (b: and determine whether the test in (a: is valid.