The production engineer for the manufacturing plant in Exercise 17.61 has just included another variable: the worker’s gender, coded as 1 = female and 0 5 male. File XR17065 contains the expanded set of data. With y = productivity (units/hour), x1 = number of units in the backlog area, and x2 = gender, fit a first order model with no interaction term. Interpret the partial regression coefficients and the R2 value. At the 0.02 level, is the model significant?