Mean of the combined sample
A sample of n 4 scores has a mean of M 12. A second sample of n 6 scores has a mean of M 8. If the two samples are combined, what value will be obtained for the mean of the combined sample?
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A sample of n 8 scores has a mean of M 12. One new score is added to the sample and the new mean is found to be M 13. What is the value of the new score?
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