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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 between those means

Sagot :

Answer: it is not appropriate to use this standard deviation formula because the samples are not independent of each other

Explanation:

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