The marketing team at an internet music site wants a better

The marketing team at an internet music site wants a better understanding of who their customers are. They send out a survey to 25 customers asking for demographic information. One of the variables is the customer\'s age. For the 25 customers, the ages and a histogram of those ages are shown to the right. Complete parts a) through c).

Solution

a) The given data in ascending order is 11,15,21,22,22,25,25,28,29,30,30,31,32,32,33,35,36,36,37,42,43,43,43,47, 48

N= 25

Median = (N+1/2)=(25+1/2)= 13 th observation.

hence median age = 32

hence the mean age should be about the same size as the median because the distribution is roughly symmetric.

b) mean age = (11+15+21+.....+43+47+48)/25 = 796/25=31.84