Problem Set #5 Answer Key
1)a) p(C1) = 1 / 5 = .20
b) p(CCC) = (.2)3 = .008
c) p(ECE) = (.8)(.2)(.8) = .128
d) p(CEE or ECE or EEC) = (.128)(3) = .384
e) If the probability of getting none correct on
Exam 2 Answer Key
1)a) The IV is choice, with two levels, limited and extensive. The DV is (in the analysis of interest) performance, measured by the
quality of papers. (Another DV in the experiment i
PSYC 5133
Fall '13
Exam 2
In completing this exam, you may use any resource except other people. Please adhere to the homework guidelines in deciding how
much of this to type, write out by hand, etc.
PSYC 5133
Fall '13
Exam 1
In completing this exam, you may use any resource except other people. Please adhere to the homework
guidelines in deciding how much of this to type, write out by hand, etc.
Problem Set #14 Answer Key
1) For the simple-effects tests, I used the following syntax:
unianova
time by approach attract
/method = sstype(3)
/intercept = include
/emmeans = tables(approach*attract)c
Problem Set #10 Answer Key
1)a) Addition accuracy for sixth-grade females (M = 95.4, SD = 6.2) was slightly lower than for sixth-grade males (M = 98.7, SD =
3.2)1, but this difference was not signific
Problem Set #11 Answer Key
1)a)
ANOVA
DV
Between Groups
Within Groups
Tot al
Sum of
Squares
78. 000
40. 000
118.000
df
2
6
8
Mean Square
39. 000
6. 667
F
5. 850
Sig.
.039
b) Yij = + j + ij
c) 1 = (3 6
Problem Set #13 Answer Key
1)a)
b) The only significant effect is of major, so we may conclude that engineering students rate GWB more favorably than
do humanities students. Neither interviewer nor th
Problem Set #12 Answer Key
D escriptives
1)a) For the sake of
thoroughness, I've
included some
descriptives .
notice the
heterogeneity of
variance issue (a
10:1 ratio of
highest-to-lowest
variances).
Problem Set #8 Answer Key
1) Exercise 5.2. I'm assuming normally-distributed populations here. Otherwise these questions are non-starters.
a) z = (170 200)/60 = -0.5, so p(Y > 170) = .6915
b) z = (170
Problem Set #2 Answer Key
1) Here are two answers. I much prefer Version 1. Version 2, while creative and thoughtful, assumes strong non-independence of
samplingit's kind of reverse version of the gam
Problem Set #1 Answer Key
1)a) This is an experiment because subjects were randomly assigned to conditions; that is, the researcher was
able to manipulate a variable.
b) Because this sample is based o
Problem Set 3 Answer Key
1)a) This hypothesis suggests a positive relationship
(high with high and low with low).
b) There appears to be a positive relationship in the
scatterplot at right.
c) Pearson
Problem Set #4 Answer Key
1)a) p(yes) = 100/300 or .33
b) p(blue) = 90/300 or .3
c) p(yes or blue) = 130/300 or .43 [ = p(yes) + p(blue) p(yes and blue) = 100/300 + 90/300 60/300]
d) p(yes and blue) =