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Topic: [ap-stat] YMS 3e Quiz #14.2A
Replies: 3   Last Post: Apr 20, 2012 8:11 PM

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Bob

Posts: 1,360
Registered: 6/10/11
Re:[ap-stat] YMS 3e Quiz #14.2A
Posted: Apr 20, 2012 8:11 PM
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Forwarded message:
> From: "Susie Amoroso" <samoroso@verizon.net>

> If the chi-square is the same regardless, do my students need to say
WHICH test they are doing? Is it enough just to say it's a
chi-square test?

In the past, students have been expected to state the null and their
conclusion differently depending on which design was involved. This
has always troubled me because the null and the interpretation of the
'two" tests is the same -- it's the design that differs. I would not
mind if they asked students about the design directly or asked which
would be the better design for a particualr situation, but I can't see
any point in burying the design difference in the test itself. You
only have to read all the questions about this posted here to see that
that did not work;-)

A similar situation is the use of a t test for a single mean or paired
differences. It's the same test, but in that situation students are
expected to understand the design difference, but not usually to
change the wording of the null or conclusion to show that.


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