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On-Time Performance by Airlines According to the Bureau of Transportation statistics, on-time performance by the airlines is described as follows:
Action % of Time
On time 70.8
National Aviation System Delay 8.2
Aircraft Arriving Late 9.0
Other (because of weather and other conditions) 12.0
Records of 200 flights for a major airline company showed that 125 planes were on time, 40 were delayed because of weather, 10 because of a National Aviation System delay, and the rest because of arriving late. At a = 0.05, do these results differ from the government's statistics?
Based on these results, a confidence interval for the population mean is found to be μ = 5.7 ± 4.4. Find the degree of confidence.
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