STAT-UB.0103
Exam 2 2012.APRIL.11 SQUARE Version Solutions
S1. Jason Harter is a professional fund raiser for charities. Hes currently working with
the Pets-R-Luv animal shelter. The operating account for Pets-R-Luv currently is at
$80,000. It seems reaso
STAT-UB.0103
Exam 2
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2012.APRIL.11 OVAL Version
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Solutions
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O1. Frank Tanner is the lab manager at BioVigor, a firm that runs studies for agricultural
food supplements. He has been asked to design a protocol for testing Porcine Plus, a diet
addit
These are additional sample problems for the exam of 2012.APR.11. The problems have
numbers 6, 7, and 8. This is not Minitab output, so youll find a few extra challenges.
6.
The following information concerns a regression of Y on the variables SS, TT,
UU,
STAT-UB.0103
Information for exam of 2012.APR.09
The exam of Monday 2012.APR.09 will be of the open-book variety. You may find it
helpful to have a functioning calculator. The sections of MBS10 used here are 4.7-4.8,
4.10-4.11, 10.1-10.4, 10.6-10.7, 11.1-
STAT-UB.0103
Quiz A
2012.FEB.23
Version RED
Solutions
1. The probability of winning at a certain game is only 0.10. Claudia is going to play
this game as long as it takes to get at least one winner. What is the probability that
Claudia will need 10 or mor
STAT-UB.0103 Quiz A 2012.FEB.23
Version BLUE Solutions
1. In each of the following situations, please supply the best answer. Each sub-part is
worth 5 points.
1.1.
The list of values x1, x2, , xn has standard deviation s = 15. If each
value in the list is
STAT-UB.0103
NOTES for Wednesday 2012.MAY.02
We will use the file JulieApartment.mtw. Well give the regression of Price on SqFt,
show residual versus fitted plot, save residuals and fitted. Give plot of (Resid, Price),
thats residuals versus observed. Str
STAT-UB.0103
NOTES for Wednesday, 2012.MAR.28
This begins with a note on elasticity, which is on a separate handout.
Residuals also help identify model failure, especially through using the residualversus-fitted plot. (Theres a section in the Simple Linea
STAT-UB.0103
Notes for Monday, 2012.MAR.26
by yg
n
One can show that
i
2
by yg
n
=
i =1
by y g
n
2
+
i
i =1
i
2
i
.
These sums have the
i =1
names SStotal, SSregression, and SSerror .
They have other names or abbreviations. For instance
SStotal may be
STAT-UB.0103
NOTES for Wednesday 2012.APR.25
Heres a rehash on the p-value notion:
The p-value is the smallest at which H0 would have been rejected, with these data.
The p-value is a measure of SHOCK in the data. Small ps are very shocking. Heres a
summar
STAT-UB.0103
NOTES for Wednesday 2012.APR.18
Consider next a binomial experiment, resulting in event ratio
x
x
. We use p = as the
n
n
sample proportion.
When we think of the binomial as random, we use X , upper case. Then p =
X
looks
n
x
looks like the d
STAT-UB.0103
NOTES for Wednesday 2012.APR.04
One of the clues on the library data comes through the VIF values. These VIFs tell you to
what extent a predictor is linearly dependent on other predictors. We like these to be
close to 1, and we certainly get
STAT-UB.0103
Exam 2
2012.APRIL.11
TRIANGLE
Version Solutions
T1. The output below, based on a sample of used cars, shows the regression of price on
mileage. Commas were inserted in large numbers to improve readability.
Regression Analysis: Price versus Mi