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A sample of n = 5 scores has a mean of M = 12. What is...

A sample of n = 5 scores has a mean of M = 12. What is SX for this sample?

A. 12/5 =2.40

B. 5/12=0.417

C. 5(12)=60

D. Cannot be determined with info given.

A population has a mean of m = 30. If 3 points are added to each scores, what is the mean for the new distribution?

A. 27

B. 30

C. 33

A sample of n = 8 has a mean of M = 10. After one score is removed from the sample, the mean for the remaining score is found to be M = 11. What was the score that was removed?

A. X= 3

B. X=7

C. X=8

math   Statistics-And-Probability   
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