The customer accounts at a certain departmental store have an average balance of Rs. 480 and a standard deviation of Rs. 160. Assuming that the account balances are normally distributed. (1) What proportion of the accounts is over Dollar 600 ? (ii) What proportion of the accounts is between Dollar 400 and Dollar 600 ? (iii) What proportion of the accounts is between Dollar 240 and 360 ?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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The customer accounts at a certain
departmental store have an average balance of
Rs. 480 and a standard deviation of Rs. 160.
Assuming that the account balances are
normally distributed.
(1) What proportion of the accounts is over
Dollar 600 ?
(ii) What proportion of the accounts is between
Dollar 400 and Dollar 600 ?
(iii) What proportion of the accounts is
between Dollar 240 and 360 ?
Transcribed Image Text:The customer accounts at a certain departmental store have an average balance of Rs. 480 and a standard deviation of Rs. 160. Assuming that the account balances are normally distributed. (1) What proportion of the accounts is over Dollar 600 ? (ii) What proportion of the accounts is between Dollar 400 and Dollar 600 ? (iii) What proportion of the accounts is between Dollar 240 and 360 ?
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