a)
Annual miles driven Negative ( As miles increase time will also increase)
Average load weight Negative
Average driving speed Positive
Oil change interval Negative
c)
Annual Miles Driven logical.
Average Load Weight logical
Average Driving Speed logical
Oil Change Interval logical
d)
You can see the coefficients of miles,load,speed and oil change
Given
Truck driven distance = 60 (in 1000's)
Load = 22 tonnes
Speed = 57 mph
Distance between oil change = 18 (in 1000's)
Now we can find expected time
Time = 13.2455 - 0.0941 * 60 - 0.0578 * 22 + 0.0043 * 57 - 0.0308 * 18 = 6.019 ~ 6.02 (2 decimal places)
The maintenance manager at a trucking company wants to build a regression model to forecast the t...
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