# Problem 10 - 10.c Histogram of adjusted deviation 12 6 6 12...

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Problem 10.a Using minitab, construct a histogram graph of old model deviation and MapQuest deviation. Deviation of Old Model: 37. 5 30. 0 22. 5 15. 0 7. 5 0. 0 - 7. 5 - 15. 0 60 50 40 30 20 10 0 Ol d Model Devi at i ons Frequency Hi st ogr am of Ol d Model Devi at i ons Deviation of MapQuest: 18. 0 13. 5 9. 0 4. 5 0. 0 - 4. 5 - 9. 0 70 60 50 40 30 20 10 0 Dev = act ual – MapQuest pr edi ct Hi st ogr am of Dev = act ual – MapQuest pr edi ct From the histogram, I believe the MapQuest model is more useful. Because the old model apparently has a right skew distribution, and the MapQuest has an approximately

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normal distribution, which could better indicate the actual times of delivery. 10.b Original Actual times VS Mp time: 60 50 40 30 20 10 0 - 10 60 50 40 30 20 10 0 Mapquest Ti mes Actual Times Scat t er pl ot of Act ual Ti mes vs Mapquest Ti mes Fitted line with add 5min on Map times: 60 50 40 30 20 10 0 60 50 40 30 20 10 0 add 5 on Mp Scat t er pl ot of Act ual Ti mes vs add 5 on Mp

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Unformatted text preview: 10.c Histogram of adjusted deviation: 12 6- 6- 12 90 80 70 60 50 40 30 20 10 dev Frequency Mean 2. 422 St Dev 4. 983 N 500 Hi st ogr am of dev Nor mal Histogram of old model deviation: 40 30 20 10- 10- 20 60 50 40 30 20 10 Ol d Model Devi at i ons Mean 4. 645 St Dev 10. 24 N 500 Hi st ogr am of Ol d Model Devi at i ons Nor mal Histogram of MapQuest deviation 18. 0 13. 5 9. 0 4. 5 0. 0- 4. 5- 9. 0 70 60 50 40 30 20 10 Dev = act ual – MapQuest pr edi ct Frequency Mean 7. 422 St Dev 4. 983 N 500 Hi st ogr am of Dev = act ual – MapQuest pr edi ct Nor mal Interpret: The adjusted MapQuest result is more useful because it has less error from the actual time value and has a normal distribution....
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Problem 10 - 10.c Histogram of adjusted deviation 12 6 6 12...

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