# Interpret the slope coefficient in each of the above estimated

1.

y-hat = 14 + 7.34x

y-hat = 3 + 25 In(x)

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In(y-hat) = 2 + 0.08x; se = 0.06

In(y-hat) = 2.5 + 0.48 In(x); se = 0.16

a.

Interpret the slope coefficient in each of the above estimated models, when x increase by one unit in Models 1 and 3 and by 1% in Models 2 and 4. (Round your answers to 2 decimal places.)

Model 1: y-hat increases by  units.    7.34   ;

Model 2: y-hat increases by about  units.  0.25

Model 3: y-hat increases by about  percent.   8.00

.

Model 4: y-hat increases by about  percent.   .48

2.

b.

 For each model, what is the predicted change in y when x increases by 6%, from 10 to 10.6?

Model 1: y-hat increases by  units.     4.40

Model 2: y-hat increases by  units.   1.46

Model 3: y-hat increases by  percent.   4.92

Model 4: y-hat increases by  percent.   2.84

 3. Consider the sample regressions for the linear, the logarithmic, the exponential, and the log-log models. For each of the estimated models, predict y when x equals 57. (Do not round intermediate calculations. Round your answers to 2 decimal places.)

 Response Variable: y Response Variable: ln(y) Model 1 Model 2 Model 3 Model 4 Intercept 15.13 −5.51 1.22 0.83 X 1.42 NA 0.05 NA ln(x) NA 24.45 NA 0.77 se 19.54 16.10 0.12 0.10

 y-hat Model 1 [removed] Model 2 [removed] Model 3 [removed] Model 4 [removed]

4. Eva, the owner of Eva’s Second Time Around Wedding Dresses, currently has five dresses to be altered, shown in the order in which they arrived:

If Eva uses the shortest processing time first priority rule to schedule these jobs, what will be the average job tardiness?

[removed]

2 hours

5.

Eva, the owner of Eva’s Second Time Around Wedding Dresses, currently has five dresses to be altered, shown in the order in which they arrived:

If Eva uses the shortest processing time first (SPT) priority rule to schedule these jobs, what will be the average completion time?

 [removed] 3 hours [removed] 5 hours [removed] 7 hours