$4\mathrm{.}6\mathrm{.}3$: Hypothesis test for a population proportion.

Jump to level $1$

A home improvement company is interested in improving customer satisfaction

rate from the $78\%$ currently claimed. The company sponsored a survey of $205$

customers and found that $171$ customers were satisfied.

What is the test statistic $z?$

What is the $p-$value?

Does sufficient evidence exist that the customer satisfaction rate is different than

the claim by the company at a significance level of $=0\mathrm{.}01?$ Select $$

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