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According to one survey taken a few years ago, 32% of American households have attempted to...

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Basic Math

According to one survey taken a few years ago, 32% of Americanhouseholds have attempted to reduce their long-distance phone billsby switching long-distance companies. Suppose that businessresearchers want to test to determine if this figure is stillaccurate today by taking a new survey of 80 American households whohave tried to reduce their long-distance bills. Suppose furtherthat of these 80 households, 22% say they have tried to reducetheir bills by switching long-distance companies. Is this resultenough evidence to state that a significantly different proportionof American households are trying to reduce long-distance bills byswitching companies? Let ? = .01.

Answer & Explanation Solved by verified expert
4.1 Ratings (800 Votes)
H0Null Hypothesis P 032 Same proportion of Americanhouseholds are trying to reduce longdistance bills by switchingcompaniesHA Alternative Hypothesis    See Answer
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