Aclass survey in a large class for first-year college students asked, "about how many minutes do you study on a typical weeknight? " the mean response of the 281 students was x¯¯¯x¯ = 140 minutes. suppose that we know that the studey time follows a normal distribution with standard deviation σσ = 65 minutes in the population of all first-year students at this university. regard these students as an srs from the population of all first-year students at this university. does the study give good evidence that students claim to study more than 2 hours per night on the average?