a final exam in math 160 has a mean of 73 with a standard deviation of 7.8. if 34 students are randomly selected, find the probability that the mean of their test scores is less than 82.
Added by Jennifer G.
Step 1
The standard error of the mean is the standard deviation divided by the square root of the sample size. In this case, the standard error is 7.8 divided by the square root of 34, which is approximately 1.34. Show more…
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