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18 Nov 2021
Problem 49
Page 718
Section: Practice
Chapter 13: F DISTRIBUTION AND ONE-WAY ANOVA
Textbook ExpertVerified Tutor
18 Nov 2021
Given information
Two coworkers commute from the same building. They are interested in whether or not there is any variation in the time it takes them to drive to work. They each record their times for 
commutes. The first worker’s times have a variance of 
. The second worker’s times have a variance of 
. The first worker thinks that he is more consistent with his commute times and that his commute time is shorter.
Level of significance is 
.
Step-by-step explanation
Step 1.
statistic is the ratio of the two variances.
The formula to calculate statistic is:
Where, 
is the variance of the first sample and 
is the variance of the second sample.
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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
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