The proportion of on-line shoppers who actually make a purchase appears to be relatively constant over time. In 2013, among a sample of 388 on-line shoppers, 160 purchased merchandise. In 2017, for a sample of 307 on-line shoppers, 144 purchased merchandise. At the 0.05 level of significance, did the proportion of on-line shoppers change from 2013 to 2017?   State the null and alternate hypotheses.         Make the decision rule. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)         Evaluate the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)         What is the decision regarding the null hypothesis?

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