16. Flight Delays Data Set 15 in Appendix B lists 48 different departure delay times (minutes) for American Airlines flights from New York (JFK) to Los Angeles. Negative departure delay times correspond to flights that departed early. The mean of the 48 times is 10.5 min and the standard deviation is 30.8 min. Use a 0.01 significance level to test the claim that the mean departure delay time for all such flights is less than 12.0 min. Is a flight operations manager justified in reporting that the mean departure time is less than 12.0 min?
16. Flight Delays Data Set 15 in Appendix B lists 48 different departure delay times (minutes) for American Airlines flights from New York (JFK) to Los Angeles. Negative departure delay times correspond to flights that departed early. The mean of the 48 times is 10.5 min and the standard deviation is 30.8 min. Use a 0.01 significance level to test the claim that the mean departure delay time for all such flights is less than 12.0 min. Is a flight operations manager justified in reporting that the mean departure time is less than 12.0 min?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Testing Hypotheses. In Exercises 9-24, assume that a simple random sample has
been selected and test the given claim. Unless specified by your instructor, use either the
P-value method or the critical value method for testing hypotheses. Identify the null and
alternative hypotheses, test statistic, P-value (or range of P-values), critical value(s), and
state the final conclusion that addresses the original claim.
16. Flight Delays Data Set 15 in Appendix B lists 48 different departure delay times
(minutes) for American Airlines flights from New York (JFK) to Los Angeles. Negative
departure delay times correspond to flights that departed early. The mean of the 48 times
is 10.5 min and the standard deviation is 30.8 min. Use a 0.01 significance level to test the
claim that the mean departure delay time for all such flights is less than 12.0 min. Is a flight
operations manager justified in reporting that the mean departure time is less than 12.0 min?
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