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According to a study in a previous year 57% of households nationwide used natural gas for heating during a year Recently a survey of 2700 randomly selected households showed that

According to a study in a previous year, 57.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 2,700 randomly selected households showed that 58.0% used natural gas. Use a 0.05 significance level to test the claim that the 57.0% national rate has changed.

Formulate the null and alternative hypotheses.

Find the z-value.

Find the p-value

Apr 21 2020 View more View Less

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