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Bernard Haldane Associates conducted a survey in March 2004 of 1021 workers who held white-collar jobs...

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Basic Math

Bernard Haldane Associates conducted a survey in March 2004 of1021 workers who held white-collar jobs but who had changed jobs inthe previous twelve months. Of these workers, 56% of the men and35% of the women were paid more in their new positions when theychanged jobs. Suppose that these percentages are based on randomsamples of 510 men and 511 women white-collar workers.

  1. Construct a 95% confidence interval for the difference betweenthe two population proportions.

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  1. Using the 2% significance level, can you conclude that the twopopulation proportions are different? Use the p-valueapproach.

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