Refer to Exercise 53.

a. Explain why the sample results give some evidence for the alternative hypothesis.

b. Calculate the standardized test statistic and P-value.

c. What conclusion would you make?

Exercise 53.

As the Hispanic population in the United States has grown, businesses have tried to understand what Hispanics like. One study interviewed separate random samples of Hispanic and Anglo customers leaving a bank. Customers were classified as Hispanic if they preferred to be interviewed in Spanish or as Anglo if they preferred English. Each customer rated the importance of several aspects of bank service on a 10-point scale. Here are summary results for the importance of “reliability” (the accuracy of account records, etc.):

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305 := 0.200 = 20.0%- х 1526 Group Sx %3D Anglo 92 6.37 0.60 Hispanic 86 5.91 0.93