A survey of a random sample of 300 grocery shoppers in Kimberley found that the mean value of their grocery purchases was R78. Assume that the population standard deviation of grocery purchase values is R21. Find the 95% confidence limits for the average value of a grocery purchase by all grocery shoppers in Kimberley. (95% from the z table is 1.96)

asked by guest
on Sep 25, 2024 at 1:24 am



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