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Lisa, another HR manager, thinks that the problems have nothing to do with the night shift, so she wants to prove to Edgar that proportion of
Lisa, another HR manager, thinks that the problems have nothing to do with the night shift, so she wants to prove to Edgar that proportion of day-shift workers getting adequate sleep and night-shift workers getting adequate sleep is the same. She interviews 50 day-shift workers and finds that 31 claim to get at least seven hours of sleep per night. Using the surveys for night-shift workers from problem 2 (HR surveys 80 night-shift workers and finds that 46 of them claim to get at least seven hours of sleep per night), can we say that Lisa is wrong with 95% confidence? In your answer, please use the critical-value method, stating the null and alternative hypotheses as well as the test statistic you will use.
