A sample of n = 7 scores has a mean of M = 9. One score in the sample is changed from X = 19 to X = 5. What is the value for the new sample mean?
Added by Albert S.
Step 1
Since the mean (M) of the sample of n = 7 scores is 9, use the formula for the mean, which is the total sum of the scores (S) divided by the number of scores (n). The formula for the mean is M = S/n. Rearrange this formula to find the total sum of the scores: S = Show more…
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A sample of $n=7$ scores has a mean of $M=9$. One score in the sample is changed from $X=19$ to $X=5$. What is the value for the new sample mean?
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