Last updated: October 20, 2009
POLS 210
Exam 2 Review Sheet
[PA: Ch4 (Pp72-81), Ch6
(Pp113-119), Ch2 (Pp30-41), Ch6 (Pp119-124), Ch6 (Pp127-130) SPSS: Ch2, Ch3 (Pp37-49), Phases 2
and 3]
This review
is intended to give you a general idea of what may appear on the exam from the
lectures listed below. The exam will cover material from the assigned readings
and material that was presented in the lecture.
1. Isolating the impact of
main independent variable
Experimental studies
Experimental and control groups
Premasurement and
post-measurement
Random assignment
Laboratory and field experiments
Internal validity and external validity
Controlled comparison
2. Statistical inference
Sampling, random sampling, Literary Digest poll,
How many cases?
Desired level of accuracy (margin of error,
sampling error)
Confidence level
Variability
Variability
Central limit theorem
Normal curve (Z score)
3.
Descriptive statistics
Constructing a frequency table
Bar chart
Percentages and proportions
Measures of central tendency
Mean, median, mode
Measures of variability (Dispersion)
Range, variance,
standard deviation (Using N and N-1)
Missing cases
Low variation and high variation
4. The normal
curve
Z scores
Finding areas under the normal curve
5. SPSS
Descriptive stats, recoding
6. Phases 2
and 3
7. Operationalization
8. The
z-table and the following formulae will be provided.
e.g.
|
|
2nd decimal of z |
|||||||||
|
1st digit and 1st decimal of Z |
.00 |
.01 |
.02 |
.03 |
.04 |
.05 |
.06 |
.07 |
.08 |
.09 |
|
0.0 |
.5000 |
.4960 |
.4920 |
.4880 |
.4840 |
.4801 |
.4761 |
.4721 |
.4681 |
.4641 |
|
0.3 |
.3821 |
.3783 |
.3745 |
.3707 |
.3669 |
.3632 |
.3594 |
.3557 |
.3520 |
.3483 |
|
0.6 |
.2743 |
.2709 |
.2676 |
.2643 |
.2611 |
.2578 |
.2546 |
.2514 |
.2483 |
.2451 |
|
1.0 |
.1587 |
.1562 |
.1539 |
.1515 |
.1492 |
.1469 |
.1446 |
.1423 |
.1401 |
.1379 |
|
1.2 |
.1151 |
.1131 |
.1112 |
.1093 |
.1075 |
.1056 |
.1038 |
.1020 |
.1003 |
.0985 |
|
1.3 |
.0968 |
.0951 |
.0934 |
.0918 |
.0901 |
.0885 |
.0869 |
.0853 |
.0838 |
.0823 |
|
1.5 |
.0668 |
.0655 |
.0643 |
.0630 |
.0618 |
.0606 |
.0594 |
.0682 |
.0571 |
.0559 |
|
1.9 |
.0287 |
.0281 |
.0274 |
.0268 |
.0262 |
.0256 |
.0250 |
.0244 |
.0239 |
.0233 |
|
2.0 |
.0228 |
.0222 |
.0217 |
.0212 |
.0207 |
.0202 |
.0197 |
.0192 |
.0188 |
.0183 |
|
2.3 |
.0107 |
.0104 |
.0102 |
.0099 |
.0096 |
.0094 |
.0091 |
.0089 |
.0087 |
.0084 |
|
3.0 |
.0013 |
.0013 |
.0013 |
.0012 |
.0012 |
.0011 |
.0011 |
.0011 |
.0010 |
.0010 |
10.
Weighted average (Bonus points: 3 points)