A sample of n = 6 scores has a mean of M = 8 . One new score is added to the sample, and the new mean is computed to be M = 7 . What is the value of the score that was added to the sample?
What will be an ideal response?
The original sample had n = 6 scores. ΣX = 48 . After the new score is added, there are n = 7 scores with ΣX = 49 . Because the sum increased by 1 point, the new score must be X = 1.
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