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Hypothesis Testing

Radon is a gas produced when radium decays, and it can enter homes where it can become a health threat.

Among 186 homes in Hyde Park, New York (home of Franklin D. Roosevelt), 16% were found to have unsafe radon levels (above 4 picocurries per liter). Among 237 homes in LaGrange, New York (home of the author), 19% were found to have unsafe radon levels (based on data from the New York State Department of Health).

Use a 0.05 significance level to test the claim that two Dutchess County regions have different rates of unsafe radon levels. Does the presence of unsafe radon levels appear to vary by region?

Solution Preview

*** NO, the presence of unsafe radon levels do not appear to vary by region. ***

Radon is a gas produced when radium decays, and it can enter homes where it can become a health threat.

Among 186 homes in Hyde Park, New York (home of Franklin D. Roosevelt), 16% were found to have unsafe radon levels (above 4 picocurries per liter).

Among 237 homes in LaGrange, New York (home of the author), 19% were found to have unsafe radon levels (based on data from the New York State Department of Health).

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