Test firms assumption-account balances normally distributed

Reference no: EM13122345

A brokerage firm needs information concerning the standard deviation of the account balances of its customers. From previous info it was assummed to be $250. A random sample of 61 accounts were checked. The standard deviation was $286.20. At α= 0.01, test the firms' assumption. Assume the account balances are normally distributed.

Reference no: EM13122345

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