ED Basics Flashcards
1
Q
Why is experimental design important? (4)
A
is a fundamental part of science
can help overcome time, money & ethical issues
helps overcome own bias
reduce random variation
2
Q
What is a confounding variable?
A
a 3rd variable that effects the two others
3
Q
what is a covariant?
A
a 3rd v variable that effects only the independent variable
4
Q
Simpsons paradox defintion
A
when a trend appears when data is in groups but disappears when the data are combined
5
Q
When does Simpsons paradox often occur
A
When data is mistreated and there is little or poor ED in effect (confounding variables accounted for)
