A website streams movies and television shows to millions of users. Employees know that the average time a user spends per session on their website is 2 hours. The website changed its design, and they wanted to know if the average session length was longer than 2 hours. They randomly sampled 100 users and recorded their session lengths.
What type of statical test used in this case?
A. A t-test for a mean
B. A z-test for a proportion
C. A paired t-interval for the mean difference
D. A z-interval for a proportion
E. A t-interval for a mean
