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 4.25 45.3 1.43 -44 -12 -5 9 868 Enter the exact answers. x¯= ? s= ? (d) Regardless of your answer to part (c), use the summary statistics to compute a 95% 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 95% confidence interval is ? to ? (e) Interpret the confidence interval you found in part (d) in context. Round to two decimal places.
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 4.25 45.3 1.43 -44 -12 -5 9 868 Enter the exact answers. x¯= ? s= ? (d) Regardless of your answer to part (c), use the summary statistics to compute a 95% 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 95% confidence interval is ? to ? (e) Interpret the confidence interval you found in part (d) in context. Round to two decimal places.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 | StDev | SE Mean | Min | Q1 | Q3 | Max | ||
| 1000 | 4.25 | 45.3 | 1.43 | -44 | -12 | -5 | 9 | 868 |
Enter the exact answers.
x¯= ?
s= ?
x¯= ?
s= ?
(d) Regardless of your answer to part (c), use the summary statistics to compute a 95% 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 95% confidence interval is ? to ?
Round your answers to two decimal places.
The 95% confidence interval is ? to ?
(e) Interpret the confidence interval you found in part (d) in context. Round to two decimal places.
We are 95% confident that the average actual arrival times for United flights in December is between ___? and ____? minutes later than the average scheduled arrival time.
We are 95% confident that the average actual arrival times for United flights in December is between ___? and ____? minutes later than the average scheduled arrival time.
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