SOLUTION: A sample of n = 10 scores has a mean of M = 7. One score in sample is changed from X = 21 to X = 11. What is the value of the new sample mean? The new sample mean is .

Question 1200282: A sample of n = 10 scores has a mean of M = 7. One score in sample is changed from X = 21 to X = 11. What is the value of the new sample mean?
The new sample mean is
.
Answer by ikleyn(52860) (Show Source): You can put this solution on YOUR website!
.
A sample of n = 10 scores has a mean of M = 7. One score in sample is changed
from X = 21 to X = 11. What is the value of the new sample mean?
The new sample mean is
~~~~~~~~~~~~~~~~~~~

The sum of scores of the original sample is 7*10 = 70.


After the change, the sum of scores of the updated sample is 70 - 21 + 11 = 60.


New sample mean is   = 6.    ANSWER

Solved.

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