The best earphones. You are writing an article for a consumer magazine based on a survey of the magazine’s readers that asked about satisfaction with inexpensive earphones for the iPod. Of 1317 readers who reported owning the Apple iPod earphones, 237 gave it an outstanding rating. Only 25 outstanding ratings were given by the 43 readers who owned Sennheiser sports earphones.

Describe an appropriate variable, which can be computed from these counts, to measure high satisfaction with a make of earphone. Compute the rates of high satisfaction for the Apple iPod and Sennheiser sports earphones. Which brand has the better high-satisfaction rating?

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