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A recent survey of 200 companies showed that 8 had a female as the head of...

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Statistics

A recent survey of 200 companies showed that 8 had afemale as the head of the company. A year ago, a survey of 200companies showed that 6 had a female as the head of the company. Atα = 0.05, can it be concluded that the proportion has changed? Findthe 95% confidence interval of the difference of the twoproportions.

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