Question

Which of the following best describes the change in the mean when 1213 is

included in the data set below?
34,75, 26, 81, 65, 38, 49

Answer 1

Given in the information set as

26, 34, 38, 49, 65, 76, 81

Sum = 369

No of entries = 7

Mean =52.71

When 1213 is included

New sum = 1582

No of entries =8

The new mean will be 197.75

Thus mean will be increased by 145.04