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A grocery store is trying to predict how many packages of toilet paper rolls will be...

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Statistics

A grocery store is trying to predict how many packages of toiletpaper rolls will be purchased over the next week. They know fromtheir records that each customer has a 60% chance of buying 0packages, a 30% chance of buying 1 package, an 8% chance of buying2, and a 2% chance of buying 25. They expect about 150 customersper day.

What is the probability that the average number of packages percustomer is greater than 1 over the course of a week? Assume thestore is open 7 days a week.

Please calculate the standard error.

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