1. A sample of n=8 scores has a mean of M=10. After one score is removed from the sample, the mean for the remaining scores is found to be 11. What score was removed?
2. A sample of n=4 scores has a mean of M=12, and one second with n=6, scores has a mean of M =8. If the two samples are combined, what is the mean for the combined set of scores?
3. A sample of n=6 scores has a mean of M=5. One person with a score of X=12 is added to the distribution. What is the mean for the new set of scores?
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