A student at a college administers a survey to estimate the…

A student at a college administers a survey to estimate the average number of miles driven weekly among on-campus students at USF. The student randomly selects 4 of the 10 dorms on campus and then randomly selects students who live in those 4 dorms to take the survey. What type of sampling has occurred?

4 students apply to a PhD program.  The program rejects 45%…

4 students apply to a PhD program.  The program rejects 45% of all applicants.  Students are accepted and rejected independently of each other.  Let the random variable X represent the number out of the 4 students who get rejected into the PhD Program. (Hint: Binomial distribution with n=4, P=45%)   What is the mean of the random variable?  (round your answer to 4 decimal places)