Suppose that fund-raisers at a university call recent graduates to request donations for campus outreach programs. They report the following information for last year's graduates. $0 $10 $25 $50 Size of donation Proportion of calls 0.40 0.35 0.20 0.05 Three attempts were made to contact each graduate. A donation of $0 was recorded both for those who were contacted but who declined to make a donation and for those who were not reached in three attempts. Consider the variable x = amount of donation for the population of last year's graduates of this university. (a) Write a few sentences describing what you think you might see if the value of x was observed for each of 1000 graduates. of the graduates to donate nothing, roughly to donate $10, roughly You would expect roughly roughly to donate $50. The frequencies would be close to, but not exactly, these values. The four frequencies would add to (b) What is the most common value of x in this population? $ (c) What is P(x ≥ 25)? (d) What is P(x > 0)? to donate $25, and