A Local Newspaper Reports That Young Women in Your Town

A local newspaper reports that young women in your town (i.e., a known population) sleep an average of only 5 hours per night. However, you think that women in your town who are enrolled at your college sleep more than that. You randomly select 200 women from your college and ask them to accurately record their hours of sleep. You find that they sleep an average of 7 hours per night. What test would you use to determine whether this mean difference is statistically meaningful?

A) ANOVA
B) t test for dependent means
C) t test for a single sample
D) regression