A courier service advertises that its average delivery time is
less than 6 hours for local...
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A courier service advertises that its average delivery time isless than 6 hours for local deliveries. A sample of 16 localdeliveries was recorded and yielded thestatistics    x =  5.83hours and s = 1.59 hours. At the 5% significance level, conduct ahypothesis test to determine whether there is sufficient evidenceto support the courier’s advertisement. Â
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Let be the true meandelivery time for local deliveries The appropriate hypothesisareH0 6 hoursH1 6 hoursSample mean 583hoursSample
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