Mathematics, 02.12.2019 21:31, CaptnKragg
Amajor department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. fifteen credit card accounts were randomly sampled and analyzed with the following results: x-bar = $50.50 and sample variance = 400. construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall.
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