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The results obtained by 25 students on Quiz 1 and Quiz 2 in a previous Statistics...

The results obtained by 25 students on Quiz 1 and Quiz 2 in a previous Statistics class are summarized in the following table.

Quiz 1 Quiz 2 Sample mean 77% 78% Sample standard deviation 13% 12%

Assuming both populations are normally distributed, are the marks for the two quizzes equally variable or not (at 10% significance level)?

Math   Statistics-And-Probability   
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