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1) Add the matrices + .
A)
B)
C)
D)
E) None of the above
2) At an automatic car wash, cars arrive randomly at a rate of 7 every 30 minutes. The
car wash takes exactly 4 minutes (this is constant). On average, how long would each
car spend at the car wash?
A) 28 minutes
B) 32 minutes
C) 17 minutes
D) 24 minutes
E) None of the above
3) Sales for boxes of Girl Scout cookies over a 4-month period were forecasted as
follows: 100, 120, 115, and 123. The actual results over the 4-month period were as
follows: 110, 114, 119, 115. What was the MSE of the 4-month forecast?
A) 0
B) 5
C) 7
D) 108
E) None of the above
4) Table M2-5
The data below is a dynamic programming solution for a shortest route problem.
Using the data in Table M2-5, determine the optimal arc of stage 2.
A) 4 - 6
B) 5 - 6
C) 4 - 5
D) 2 - 5
E) None of the above
5) If a qualitative variable has three categories, how many dummy variables are
needed?
A) 0
B) 1
C) 2
D) 3
E) 4
6) A prediction equation for starting salaries (in $1,000s) and SAT scores was
performed using simple linear regression. In the regression printout shown below, what
can be said about the level of significance for the overall model?
A) SAT is not a good predictor for starting salary.
B) The significance level for the intercept indicates the model is not valid.
C) The significance level for SAT indicates the slope is equal to zero.
D) The significance level for SAT indicates the slope is not equal to zero.
E) None of the above
