Answer Happy

An air conditioning repair company has developed a regression
model for predicting the time it will take to perform a repair. The
estimated regression equation is:
y-hat = 1.86 + 0.29(x1) +
1.10(x2) - 0.61(x3)
where: y = Repair time (hours)
x1 =
Months since last maintenance service
x2 = 0
if repair is mechanical; x2 =1 if repair is
electrical
x3 = 0
if repair is done by Bob; x3 = 1 if repair is
done by Dave
Referring to the regression equation above, the correct
interpretation of b0 is:
Group of answer choices
An electrical repair performed by Dave is expected to take 1.86
hours longer than a mechanical repair performed 15y Bob.
The minimum expected repair time for any repair job is 1.86
hours.
An electrical repair performed by Dave is expected to take 1.86
hours if the last maintenance service was performed 1 month
ago.
A mechanical repair performed by Bob is expected to take 1.86
hours if the last maintenance service was performed 0 months
ago.