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An airline company is interested in improving customer satisfaction rate from the 77% currently claimed. The company sponsored a survey of 171 customers and found

An airline company is interested in improving customer satisfaction rate from the 77% currently claimed. The company sponsored a survey of 171 customers and found that 140 customers were satisfied.

What is the test statistic z?

What is the p-value?

Does sufficient evidence exist that the customer satisfaction rate is higher than the claim by the company at a significance level of = 0.05?

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