At 12:28 PM 1/17/01 -0600, Paul R Swank wrote:
>But if you group the subjects on the basis of their pretest scores, the
>lowest group gains 23.1 points while the highest group only gains 19.2.
>Looking at the graph, I note that the person who scored 34 on the pretest
>did not increase as much as I might expect while the person who scored 10
>increased more than I might expect. The best fit line is obviously flatter
>than the best fit l;ione for the pre and post tests.
not sure what you are referring to as the low and high ... but the data
below has been sorted on the pretest from high to low ... and, then i
looked at the mean gain for the low 6 (on the pre) and the top 6 (on the
pre) and found ..
> >if i sort the pre from high to low and then list the gain ... we can see
> >easily that the high pres gain more in fact, the top 6 gain about 51 points
> >on average ... while the low 6 gain only about 35 points on average
thus, unless you did some quite different calculations ... i don't see
where you get a gain of 23 for the low and 19 for the top?
whenever one discussed RTM ... they seem to talk about the upper level
group (near the top) and the lower level group (near the bottom) and that
is exactly what i did
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