Question: You are shopping for electronics, and are comparing four different items which are on sale: A television, which costs $300; a computer which costs $1200;

You are shopping for electronics, and are comparing four different items which are on sale: A television, which costs $300; a computer which costs $1200; a game system which costs $400; and a home stereo system which costs $800.

You know that for each of these items, the prices normally have mean and standard deviation as below:

Item Mean Standard Deviation

Television 500 100

Computer 1400 200

Game System 550 50

Home Stereo System 900 30

Use the z-scores to compare the different sales.Which is the best deal?

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