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A local bank needs information concerning the savings account balances of its customers A random...

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A local bank needs information concerning the savings account balances of its customers A random sample of 15 accounts was checked The mean balance was 686 75 with a standard deviation of 256 20 Find a 98 confidence interval for the true mean Assume that the account balances are normally distributed Round to the nearest cent OA 326 21 437 90 OB 487 31 563 80 OC 238 23 326 41 D S513 17 860 33

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