Math 221
posted by Nicole .
What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual?

Math 221(?) 
PsyDAG
What samples?
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1. What if the size for each sample were increased to 20? 
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Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? 
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