A sample of n = 6 scores has a mean of M = 5.One person with a score of X = 12 is added to the distribution.What is the mean for the new set of scores?
A)M = 5
B)M = 6
C)M = 7
D)M = 8

Question

A sample of n = 6 scores has a mean of M = 5.One person with a score of X = 12 is added to the distribution.What is the mean for the new set of scores?​
A)​M = 5
B)​M = 6
C)​M = 7
D)​M = 8

Quizplus · Accepted Answer

To find the new mean, we need to add the score of 12 to the original sum of scores and divide by the new number of scores.

The original sum of scores is 6 * 5 = 30.

The new sum of scores is 30 + 12 = 42.

The new number of scores is 6 + 1 = 7.

The new mean is 42 / 7 = 6. Therefore, the answer is B) M = 6.

A Sample of N = 6 Scores Has a Mean