Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
QUESTION
Airline United Southwest Sample Size 40 42 Average Number of Delays per 141 361 Month Population Standard Deviation 270 402
The following data on flight delays for United and Southwest is provided:
Standard Deviation
a. What is the 98% confidence interval for the difference in flight delays from United to Southwest?
b. What is the test statistic for testing to see if there is a significant difference in the number of delays?
Airline United Southwest Sample Size 40 42 Average Number of Delays per 141 361Month Population Standard Deviation 270 402