Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

Exercise 3

Daily revenue from vending machines placed in various buildings of a major university is as follows:
20, 75, 43, 62, 51, 52, 78, 33, 28, 39, 61, 56, 43, 49, 48, 49, 71, 53, 57, 46, 42, 41, 63, 36, 51, 59, 40, 32, 37, 29, 26
a) Construct a frequency distribution table with a cell size of 12 starting with 19.5 (i.e., first cell is 19.5-31.5, next is 31.5-43.5, etc.).
b) Determine the probability distribution.
c) What is the probability of revenue from a machine being less than $44
d) What is the probability that revenue from a machine will equal or exceed $44