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Given Population mean Given mean Standard deviation sample size = 3.6 = 3.35 = 0.9 n = 81 Test hypothesis are Null hypothesis Alternate hypothesis Ho: H:H = * 3.6 3.6 df Test statistic 0-1 = 80 Test statistic t=* = s/n = (3.35-3.6)/(0.9/81) -2.5 P-value P(|t>2.5) = 0.0145 (Two tailed) Decision Since p-Value <0.10 hence reject the Ho Reject Ho, there is suficient evidence to conclude that the proportion of waiting time is different from 3.6 minutes Option C is correct
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