Question

Magazines: The following data represent the annual costs in dollars, of a sample of

11 popular magazine subscriptions.

15.12

9.98

20.99

7.98

10.01

11.99

117.01

14.97

12.01

16.02

9.99

(a) Find the mean annual subscription cost. Round the answer to at least three decimal places.

(b) Find the median annual subscription cost. Round the answer to at least two decimal places.

Answer 1

Here we have the annual costs in dollars of a sample of 11 popular magazine subscriptions

15.12

9.98

20.99

7.98

10.01

11.99

117

14.97

12.01

16.02

9.99

a) mean is,

Thus mean annual subscription cost is 22.37

b) Now we have to find median

First we arrange data in ascending order,

7.98

9.98

9.99

10.01

11.99

12.01

14.97

15.12

16.02

20.99

117.01

median is the middle value of sorted list of numbers,

Here total numbers are 11

so middle value is (11+1)/2=6th value in sorted list of numbers i.e. 12.01

Hence median is 12.01