Information Technology Reference
In-Depth Information
Most social and behavioral scientists prefer to work with means and
standard deviations. A useful heuristic to remember is that when you
report a mean from a continuous variable, you should also report its stan-
dard deviation. This information provides the reader with the necessary
context to interpret the variability within your study.
CHAPTER 2 EXERCISES
2.1.
Students were asked to rate the quality of the university lunch menu
on the following Likert-type scale: 4
=
excellent
,3
=
good
,2
=
fair
,and
1
=
poor
.
Ratings
3
3
2
1
4
3
2
2
Compute the mean, median, mode, range, variance, and standard deviation
for this distribution of scores.
2.2.
A second sample of cafeteria lunch evaluators produced the following
data:
Ratings
4
4
3
2
4
3
3
4
2
3
Compute the mean, median, mode, range, variance, and standard devia-
tion for this distribution of scores.
