the customer accounts of a certain departmental store have an average balance of 120 and standard deviation of $40. assuming that the account balances are normaly distributed: 1. what proportion of the account is over $150 2. what proportion of the account is between $100 and $ 150? 3. what proportion of the account is below $70
Posted on Jul 18, 2010 @ 7:05:17 am
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