B. The proportion of customers who are completely satisfied in a recent satisfaction survey of 300...

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B. The proportion of customers who are completely satisfied in arecent satisfaction survey of 300 customers at XYC Inc. is found tobe 0.26. Test the hypothesis that the populationproportion of customers who are completely satisfied is greaterthan 0.22 using the critical value approach and a 0.05 level ofsignificance. e Test the hypothesis that the population proportionof customers who are completely satisfied is less than 0.30 usingthe p-value approach and a 0.05 level of significance. b. Test thehypothesis that the population proportion of customers who arecompletely satisfied is different from 0.24 using the p-valueapproach and a 0.05 level of significance. C.

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b Ho p 022 H1 p 022 Right tail test Level of Significance 005 Number of Items of Interest x 78 Sample Size n 300 Sample Proportion p xn 02600 Standard Error SE p1pn 00239 Z Test Statistic ppSE 02600 022 See Answer

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