Mathematics, 21.04.2021 01:30, tefanyc13
Maria is a college professor, and she wonders how the scores compare on her midterm and her final. She teaches
two sections of a course, and each section has 180 students. She decides to take a random sample of 10
students from each section. For those students, she'll calculate the mean midterm score and the mean final
score. She plans to look at the difference (Final - Midterm) between those means.
Consider the formula:
02 02
021-22 =
+
V ni
722
Why is it not appropriate to use this formula for the standard deviation of Tp - EM?
Answers: 1
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