A sample of n = 4 scores has a mean of M = 8.If one new score with a value of X = 3 is added to the sample,what will be the value for the new mean?
A)M = 7
B)M = 8
C)M = 8.75
D)Cannot be determined with the information provided

Question

Quizplus · Accepted Answer

The original total for the 4 scores is 4 * 8 = 32. Adding a new score of 3 gives a new total of 32 + 3 = 35. Dividing by the new number of scores (5) gives a new mean of 35 / 5 = 7.

A Sample of N = 4 Scores Has a Mean