An airline company is interested in improving customer satisfaction rate from the 57% currently claimed. The company sponsored a survey of 102 customers and found that 68 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 a= 0.05? (yes or no)

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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An airline company is interested in improving customer satisfaction rate from the 57% currently claimed. The company sponsored a survey of 102 customers and found that 68 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 a= 0.05? (yes or no)

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