minitabpt2 - 99% CI T P Late Arrival% 144 20.076 4.088...

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Kyle Rolf 811228776 Stats 119 5/4/08 Mini Tab Part Two 1. Test and CI for One Proportion a. Sample X N Sample p 90% CI 1 1184 50000 0.023680 (0.022562, 0.024798) Normal Approximation. b. We are 90% confident that the true Population Proportion of cardholders is between 0.022562 and 0.024798. c. Because .02 does not fall inside the 90% confidence interval, the campaign would be worth paying the expense because it falls above the 2% acceptance rate. 2. One-Sample T: Late Arrival% Variable N Mean StDev SE Mean
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Unformatted text preview: 99% CI T P Late Arrival% 144 20.076 4.088 0.341 (19.186, 20.965) 26.64 0.000 We are 99% confident that the true Population Proportion of the average percent of flights with late arrival is between 19.186 and 20.965. 3. One-Sample T: OT Arrival% Ho: M=82 Ha: M< 82 95% Upper Variable N Mean StDev SE Mean Bound T P OT Departure 144 81.184 4.471 0.373 81.801 -2.19 0.015 There is sufficient evidence to indicate that the average amount of flights that depart on time is less than 82%....
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