Stats: Modeling the World Nasta Edition Grades 9-12
3rd Edition
ISBN: 9780131359581
Author: David E. Bock, Paul F. Velleman, Richard D. De Veaux
Publisher: PEARSON
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Chapter 3, Problem 38E
(a)
To determine
To Explain: the two services overall percentage of late deliveries.
(a)
Expert Solution
Explanation of Solution
Given:
| Delivery service | type of service | number of deliveries | number of late packages |
| Pack Rats | Regular | 400 | 12 |
| Overnight | 100 | 16 | |
| Boxes R us | Regular | 100 | 2 |
| Overnight | 400 | 28 |
Calculation:
For pack rats services
Total number of deliveries 400+100=500
Number of late package 12+16=28
Late deliveries for pack rats
For Boxes R US services
Total number of deliveries 400+100=500
Number of late packages 2+28=30
Therefore the overall percentage of late delivery is slightly lower for Pack Rats service (5.6%) in comparison to Boxes R US service (6%).
(b)
To determine
To Explain: that pack rats delivers on time more often, agree or not.
(b)
Expert Solution
Explanation of Solution
Given:
| Delivery service | type of service | number of deliveries | number of late packages |
| Pack Rats | Regular | 400 | 12 |
| Overnight | 100 | 16 | |
| Boxes R us | Regular | 100 | 2 |
| Overnight | 400 | 28 |
By seeing the part (a), it is observed that it could conclude that pack rats deliver more often on time but there is difference between the late deliveries of packages.
(c)
To determine
To find: the phenomenon of the result here are an instance.
(c)
Expert Solution
Explanation of Solution
Given:
| Delivery service | type of service | number of deliveries | number of late packages |
| Pack Rats | Regular | 400 | 12 |
| Overnight | 100 | 16 | |
| Boxes R us | Regular | 100 | 2 |
| Overnight | 400 | 28 |
By seeing the result, it is observed that the results are an instance of Simpson’s Paradox phenomenon.
Chapter 3 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Ch. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - Prob. 8ECh. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 13ECh. 3 - Prob. 14E
Ch. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - Prob. 18ECh. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - Prob. 22ECh. 3 - Prob. 23ECh. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Prob. 27ECh. 3 - Prob. 28ECh. 3 - Prob. 29ECh. 3 - Prob. 30ECh. 3 - Prob. 31ECh. 3 - Prob. 32ECh. 3 - Prob. 33ECh. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Prob. 37ECh. 3 - Prob. 38ECh. 3 - Prob. 39ECh. 3 - Prob. 40E
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