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Difference between the two population proportions

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Reference no: EM132847660

Supermarket shoppers were observed and questioned immediately after putting an item in their cart. of a random sample of 510 choosing a product at the regular price, 320 claimed to check the price before putting the item in their cart. of an independent random sample of 332 choosing a product at a special price, 200 made this claim. Find a 90% confidence interval for the difference between the two population proportions.

Reference no: EM132847660

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