Question

Following data set to answer the questions. 13,15,20,20,20,20,20,20,20,23,27,31 What is the mean?

Answer 1

mean = 20.75

Explanation:

the mean is calculated as

mean =
`(sum)/(count)`

that is the sum of the data set ÷ number of values in data set

sum = 13 + 15 + 7(20) + 23 + 27 + 31

= 13 + 15 + 140 + 23 + 27 + 31

= 249

and count = 12

substitute these values into the formula for mean

mean =
`(249)/(12)` = 20.75