To estimate the mean number of daily study hours in the population of all the students at a large public university, a researcher plans to randomly sample students from this population and then calculate the average number of daily study hours for the sample (x-bar). Pictured below (in scrambled order) are three histograms:.
A. The distribution of study hours in the population of all students in the university.
B. The sampling distribution x-bar when samples of size n=5 are chosen from the population.
C. The sampling distribution x-bar when samples of size n=30 are chosen from the population.