Mathematics, 17.12.2019 06:31 rosyposy43

Alocal 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. a) ($532.86, $840.64) c) (s513.14, $860.36) b) (s544.87, $828.63) d) (s326.21, $437.90)

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Alocal bank needs information concerning the savings account balances of its customers. a random sam...