Contingency Tables- Oct. 1, 2012

Our lesson in Contingency tables:

This lesson is pretty hard though...

As what I've learned...

- Test for independence of variables is used to determine whether two variables are independent or related to each other when a sample is selected

First-   State the hypotheses
ex.

H_o: The opinion about the procedure is independent...

H₁: The opinion about the procedure is dependent...

Second-   To get the degree freedom:
(R-1)(C-1)
ex.
If there are three rows and two columns
(3-1)(2-1)= 2

Third- Find the expected value
Fourth- Find the Test value
using this formula

Fifth- Find Critical Value
using d.f. = 2 a= o.o5 CV= 5. 991

Sixth- Make the decision.
Seventh- Make the summary.

By: Carl Joel E. Palma III- Gold