QUESTION 3 In a random sample of 350 food shops, it was found that 130 of them
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QUESTION 3
In a random sample of 350 food shops, it was found that 130 of them had special offers.
(a) Calculate an approximate 95% confidence interval for the population of all food shops with special offers.
(b) Estimate the new size of a random sample required for an approximate 95% confidence interval for the proportion calculated in (a) that has margin of error of 0.04.
Related Book For
Statistics for Business and Economics
ISBN: 978-0132930192
8th edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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