Customers at a gas station pay with a credit card (A), debit card (B), or cash (C).
Question:
a. Among the next 100 customers, what are the mean and variance of the number who pay with a debit card? Explain your reasoning.
b. Answer part (a) for the number among the 100 who don't pay with cash.
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Related Book For
Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore
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