An air conditioning repair company has developed a regression model for predicting the time it will take to perform a re

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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 done by
Dave
Referring to the regression equation above, what is the expected
repair time for an electrical repair done by Bob if it has been 3
months since the last maintenance service?
Group of answer choices
2.73 hours
3.83 hours
3.25 hours
3.22 hours