3. A sample of n = 9 scores has a mean of x̄ =13. After one...
3. A sample of n = 9 scores has a mean of x̄ =13. After one score is added to the sample, the mean is found to be x̄ =12. What is the value of the score that was added?
Homework Answers
n=9; mean= 13
Therefore total sum of all scores= 13*9=117
After an addition of a score, new mean = 12
hence total sum of score now = 12*10= 120
therefore the new score added = 120-117
which is equal to 3
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