United Flights in December
We look at a random sample of 1000 United flights in the month of
December comparing the actual arrival time to the scheduled arrival
time. Computer output of the descriptive statistics for the
difference in actual and expected arrival time of these 1000
flights are shown below.
N | Mean | StDev | SE Mean | Min | Q1 | Median | Q3 | Max |
1000 | 9.92 | 40.3 | 1.27 | -45 | -13 | 0 | 19 | 455 |
Use the summary statistics to compute a confidence
interval for the average difference in actual and scheduled arrival
times on United flights in December.
Round your answers to two decimal places.
The confidence interval is Enter your answer in
accordance to item (c) of the question statement to Enter your
answer in accordance to item (c) of the question statement .
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