SOLUTION: A sample of size 7 (n = 7) has a mean of M = 9. One of the sample scores is changed from x = 19 to x = 5. What is the value for the new sample mean?

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Question 577567: A sample of size 7 (n = 7) has a mean of M = 9.
One of the sample scores is changed from x = 19 to x = 5. What is the value for the new sample mean?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the scores is 7*9 = 63

If we change one of the scores from 19 to 5, we decrease the sum by 14, so we get 49

The new sample mean is 49/7 = 7.