the standard deviation of 61 men approving the president's job performance is 6.2.the standard deviation of 41 women approving of his job is 10.2.at the 0.05 level,is there a difference in the standard deviations between the standard deviations of th

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the standard deviation of 61 men approving the president's job performance is 6.2.the standard deviation of 41 women approving of his job is 10.2.at the 0.05 level,is there a difference in the standard deviations between the standard deviations of th

the standard deviation of 61 men approving the president's job performance is 6.2.the standard deviation of 41 women approving of his job is 10.2.at the 0.05 level,is there a difference in the standard deviations between the standard deviations of th
the standard deviation of 61 men approving the president's job performance is 6.2.the standard deviation of 41 women approving of his job is 10.2.at the 0.05 level,is there a difference in the standard deviations between the standard deviations of the approval ratings.

the standard deviation of 61 men approving the president's job performance is 6.2.the standard deviation of 41 women approving of his job is 10.2.at the 0.05 level,is there a difference in the standard deviations between the standard deviations of th
用F检验,检验二者方差是否相等.
F=10.2^2/6.2^2
查自由度为40,60的F0.05=1.59
因为F>1.59,故二者方差之间有显著差异.
你的问题是标准差,其实都一样.

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