Supermarket shoppers were observed and questioned immediately after putting an item in their cart. Of a random
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Supermarket shoppers were observed and questioned immediately after putting an item in their cart. Of a random sample of 220 choosing a product at the regular price, 137 claimed to check the price before putting the item in their cart. Of an independent random sample of 280 choosing a product at a special price, 206 made this claim. Find a 90% confidence interval for the difference between the two population proportions.
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Related Book For 
Statistics For Business And Economics
ISBN: 9781292315034
9th Global Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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