An analysis of the amount of interest paid by ABX banks' visa card holders reveals that the
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Question:
An analysis of the amount of interest paid by ABX banks' visa card holders reveals that the amount is normally distributed with a mean of $27 and a standard deviation of $7.
a. What proportion of the Bank's Visa card holders pay more than $30 in interest? (2.5 marks)
b. What proportion of the Bank's Visa card holders pay more than $40 in interest? (2.5 marks)
c. What proportion of the Bank's Visa card holders pay less than $15 in interest? (2.5 marks)
d. What interest payment is exceeded by only 20% of the bank's Visa cardholders? (2.5 marks)
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