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:

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. Construct a relative frequency histogram to represent the population distribution of this variable.
b. What is the most common value of x in this population?
c. What is P(x ‰¥ 25)?
d. What is P(x‰¥ 0)?

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Size of donation Proportion of calls 45 30 20.05 $0 $10 $25 $50