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C10 STATISTICS:
1/3 Examination pretest

CIRCLE THE NUMBER NEXT TO THE BEST ANSWER TO THE QUESTION, OR FILL IN THE BLANK

Which scale of measurement -- (1) nominal, (2) ordinal, or (3) interval/ratio -- applies to the following political data?

1. _____ The ethnicity
of voters

2. _____ Citizens'
ratings of Bill Clinton's performance in the
presidency

3. _____ Median income
per capita

4. Which statistic is
most useful for measuring dispersion in nominal
data?

1- index of
variation
2- range
3- variance
4- standard deviation

5. In a unimodal,
negatively-skewed distribution, the mean stands (HINT:
Sketch the distribution)

1- to the right of the
mode
2- to the left of both the median and the mode
3- between the median and the mode
4- to the right of the median

6. Which of the
following measures of central tendency is most
appropriate for nominal data?

1- mode
2- median
3- mean
4- average

7. Briefly explain the
purpose of the Open > Data option on the SPSS

8. Describe the
difference between Data View and Variable
View in the SPSS Data Editor.

9. Distinguish between
*.sav and *.por files in SPSS.

10. If you wanted to
compute a new variable (or recompute the values of an
existing variable), where would you go in the SPSS menu
bar?

1- Data

2- Transform

3- Analyze

4- Utilities

11. Describe the differences
among these SPSS terms: Variable Name, Variable Label,
and Value Label.

For these data (2,3,1,5,4) compute the values requested
in questions 12 & 13. Show your computations in the

X

mean

X-mean

(X-mean)2

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

_

12. = ________
13. = _______

14. Granted that correlational analysis and regression analysis are related, briefly state how they differ--i.e., what does each technique reveal?

15. Which of these is the formula or term for covariation?

1- 2- 3- 4- 16 The regression
equation predicting the percent of states' votes for
President Reagan in 1984 is

Reagan84 = 14.9 +
.88Reagan80

Use this equation to
predict Reagan's vote in 1984 from a state that voted 52%
for Reagan in 1980.

17. You know that the
correlation coefficient between the states' votes for Reagan
in 1980 and 1984 is r= .90. Describe in words the
strength of this correlation.

18. Standard deviation is
one concept in statistics that can only be defined through
its formula. State that formula.

to two decimal places, what proportion of the cases in a
normal distribution lie between plus and minus one standard
deviation?

20. Which of these
statistics is not used in evaluating whether a data
distribution fits the normal distribution?

1- standard
deviation

2- skewness

3- kurtosis

4- intercept

```