An airline company is interested in improving customer satisfaction rate from the 50% currently claimed. The company sponsored a survey of 122 customers and found that 72 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=0.01?

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Q: 71 67 67 72 76 72 73 68 72 72

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