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Topic: RE: sugggestion needed
Replies: 1   Last Post: Oct 2, 1996 5:27 AM

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Chandler J. Pike

Posts: 6
Registered: 12/6/04
RE: sugggestion needed
Posted: Oct 1, 1996 9:55 AM
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I teach an introductory statistics class at the college level. I have a
newspaper article that states that college graduates make m thousand per
year where as non college graduates make n thousand per year. m is
greater than n and the point of the article is that college tuition is
worth it.

Then we discuss how realistic it is to use the mean income per year to
describe ALL college graduates. We discuss variables that might have an
effect on the amount of money earned - students usually mention major,
career area, etc. I usually have to suggest number of years out of
college, and they agree that they expect to make more later on than they
do the first couple of years.

I then ask them to fill in the blanks of the following question. In x:____
years I will be making y:_____ thousand dollars a year. I request that
they choose x between 1 and 10 and that everyone not have a y that ends
in 0 or 5. I then go around the room and everyone calls out their values
- this always brings a lot of laughs and provides insight into the goals
of fellow students.

A scatterplot, correlation, and regression equation follow. I find it
very easy to explain percent of variation explained by x using this
example. It is also easy to explain that the predicted value is a better
estimate than the mean y bar.

You may have had something more political in mind.

Chandler J. Pike






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