Organizations that emphasize workplace spirituality focus on individual development

On average, how long does a plow wait before the mechanic begins the repair?

A crew of mechanics at the Department of Transportation garage make minor repairs to snowplows during the winter. The snowplows break down at an average rate of 4 vehicles per day and breakdowns are distributed according to the Poisson distribution. The mechanic can service an average of 7 vehicles per day with a repair time distribution that approximates a negative exponential distribution. Assume an 8 hour day. A) 0.19 hour B) 1.25 hours C) 1.52 hours D) 2.64 hours

Armed only with his fingers, the owner decides that the safest forecasting approach is a linear trend line. Generate a forecast for the year using this technique and then calculate forecast errors using MAD

What is the mean absolute deviation for this forecasting approach? A) 33.3 B) 21.7 C) 28.2 D) 25.9