Answer to Question #201370 in Statistics and Probability for Ahmad

Question

A marketing research analyst selects a random sample of ten customers out of the fourty

who purchased a particular item from central store. The ten customers purchased different item 

from central store i.e. 11, 37, 25, 62, 51, 21, 18, 41, 32, 20. If a random sample of ten items are 

selected, what is the probability that customer will have a mean item which is a) at least thirty 

one b) at most fifty five c) between thirty nine and fifty six d) mean item is fifty percent and e) 

mean item is hundred percent.