Posted by rita on Sunday, June 9, 2013 at 5:35pm.
A sample of n = 7 scores has a mean of M = 5. After one new score is added to the sample, the new mean is found to be M = 6. What is the value of the new score? (Hint: Compare the values for ƩX before and after the score was added.

statistics  Kuai, Sunday, June 9, 2013 at 7:35pm
Mean = sum/n
5 = sum/7
5(7) = 7(sum/7)
35 = sum
35 to 42
4235 = 7