Suppose that in a sample of 4625 customers at a food store, 2457 food shop more than once a week. Find a 99% confidence interval for the population proportion of customers who shop more than once a week. a) Is this a z-value or a t-value confidence interval? (Write z or t.) b) What is the z-value or t-value? c) = d) State the confidence interval. e) Interpret your result. f) A claim is made that 54% of all customers at a food store shop more than once a week. Using the results from part (d) of this problem, would this claim be valid or invalid?

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