Test of Two Variances · Exercise 6
Two coworkers commute from the same building. They are interested in whether there is any variation in the time it takes them to drive to work. They each record their times for 20 commutes. The first worker’s times have a variance of 12.1. The second worker’s times have a variance of 16.9. The first worker thinks that he is more consistent with his commute times. Test the claim at the 10 percent level. Assume that commute times are normally distributed.
What is n?
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OpenStax, Statistics · §13.4 Test of Two Variances · Exercise 6
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