# Weekly sales with the El Barato Supermarket Family Card are on average $2,570 in its Mayagez store

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## Question:

Weekly sales with the El Barato Supermarket Family Card are on average $2,570 in its Mayagüez store with a standard deviation of $680.

Determine what is the probability that in a sample of 81 weeks

a) the sample average weekly sales is at least $2,300?

b) Is the sample average weekly sales between $2,400 and $2,600?

**Related Book For**

## Business Statistics A Decision Making Approach

ISBN: 9780133021844

9th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry