(Steps Shown) A Statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled
Question: A Statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final exam scores from students enrolled today and from five years ago is given below:
Today Five years ago
Mean 82 88
Variance 112.5 54
Sample Size 45 36
The point estimate of the standard deviation of the difference between the means of the two populations is
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