2dqs for $5

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Watch the instructional videos provided in the link.  Also review the content in sections 4.10 and 4.11 of your e-book Business Research Methods by McClave on Sampling Distributions.   Based on this information, what is the sampling distribution of the mean and why is it important?  Suppose one collects a random data sample of 100 participants and the sample mean is 20 with a sample standard deviation of 5.  What can we say about the distribution of the sample mean?