Your company sells and services dishwashers. The data show the number of warrant

Question

Your company sells and services dishwashers. The data show the number of warranty repair calls your company has made on a sample of dishwashers over the course of each dishwasher's warranty period. Each dishwasher comes with a 1-year warranty. During the warranty period, your company will repair the dishwasher at no cost to the customer. Your company is considering offering customers who require repeated dishwasher warranty repairs a new dishwasher (at no charge, but without a warranty). A new dishwasher costs your company $500 plus $300 to install. How many times should a customer request service to qualify for the new dishwasher?

Number time needed a repair 0 3128 1 141 2 38 3 189 4 12 5 1 6 2 7 27 Total number of customers 3538 total number of repairs 1038

Explanation / Answer

The question is not clear. But note the point that to qualify for new dishwasher, repeated repair calls must be made. So you need to make more than 1 repair calls.

Here from the data you can see

P(0 repair calls)=3128/3538

P(1 repair call)=141/3538.

Now Reqd is repeated repair calls: -

P(repeated repair calls)=1-((3128/3538)+(141/3538))=0.076032.

Since question is not clear, this much is been understood.

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