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A plumbing company is interested in whether the reasons for service calls tend to differ between weekdays and weekends. The following table summarizes a random
- A plumbing company is interested in whether the reasons for service calls tend to differ between weekdays and weekends. The following table summarizes a random sample of 400 service calls, giving both the reason why the call was made and whether or not it was the weekend; do the data provide evidence of an association between the two variables? Test at the 1% significance level.
Weekend | |||
Reason for Call | No | Yes | Total |
Estimation | 44 | 11 | 55 |
Repair | 130 | 60 | 190 |
Installation | 120 | 15 | 135 |
Other | 16 | 4 | 20 |
Total | 310 | 90 | 400 |
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Functional Analysis And The Feynman Operator Calculus
Authors: Tepper L Gill, Woodford W Zachary, Zachary Woodford
1st Edition
331927595X, 9783319275956
