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Home Q & A Board Science-Related Homework Help Psychology
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antionett15 antionett15
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6 years ago
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?

Question 2

A sample of n = 7 scores has a mean of M = 11 . If one score with a value of X = 5 is removed from the sample, what is the mean for the remaining scores?
 
  What will be an ideal response?
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#1
6 years ago
Answer to q. 1

The original sample had n = 6 scores. X = 48 . After the new score is added, there are n = 7 scores with X = 49 . Because the sum increased by 1 point, the new score must be X = 1.

Answer to q. 2

The original sample had n = 7 scores. X = 77 . When the score is removed, there are n = 6 scores with X = 72 . The new mean is M = 12.
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