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| normal distribution |
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bettyk |
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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Education
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