STAT501 Mid Term Exam 2 Solution
STAT 501 – Mid-Term Exam 2 – Spring 2015 – Due April 12
Instructions: Use Word to type your answers within this document. Then, submit your answers in the appropriate dropbox in ANGEL by the due date and within 3 hours of downloading the exam. The point distribution is located next to each question.
Choose the most appropriate plot for each of the following models (where D1 and D2 represent a set of indicator variables):
Coefficients
Term Coef SE Coef T-Value P-Value
Constant 4.49 1.89 2.37 0.022
X1 0.759 0.374 2.03 0.048
X2 0.965 0.426 2.26 0.028
X1*X2 0.1742 0.0821 2.12 0.039
Response is InfctRsk
C
u
l C N
t X e u
S u r n r
t r a s s
R-Sq R-Sq Mallows a e y u e
Vars R-Sq (adj) (pred) Cp S y s s s s
1 35.5 34.8 30.2 51.2 1.1351 X
1 34.7 34.0 30.7 53.2 1.1428 X
2 53.0 52.0 48.3 14.0 0.97380 X X
2 46.3 45.1 40.9 29.2 1.0415 X X
3 57.0 55.6 51.4 7.1 0.93657 X X X
3 56.0 54.6 49.5 9.4 0.94740 X X X
4 59.3 57.5 53.1 4.0 0.91622 X X X X
4 58.7 56.9 52.0 5.4 0.92323 X X X X
5 59.3 57.1 51.0 6.0 0.92120 X X X X X
STAT501 Mid-Term Exam 2 Solution
Analysis of Variance Source DF Adj SS Adj MS F-Value P-Value Regression 4 112.612 28.1529 33.54 0.000 Stay 1 15.703 15.7032 18.71 0.000 Cultures 1 19.536 19.5358 23.27 0.000 Xrays 1 4.345 4.3451 5.18 0.025 Nurses 1 7.480 7.4801 8.91 0.004 Error 92 77.231 0.8395 Total 96 189.842...
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