I am working on a project and it has been a while since I took stats. I am comparing drop out and retention rates among a particular group of students, before and after the implementation of new lesson plans/curriculum, to determine if the new curriculum made a difference. I'm supposed to use a two-tailed test since I don't know which direction the results will go in, right? (Obvioulsy I don't know for sure!) Also would I be using a z-test, t-test, chi square! I just don't remember anything about this and it's not my expertise!
2006-10-16 10:20:39 · 1 answers · asked by MorningStar 2 in Science & Mathematics ➔ Mathematics
So the null hypothesis is that implementation fo the new curriculum will not make a difference in the two groups. I will not reject the null hypothesis unless the difference in favor of the new curriculum is so big that it would have only a small chance due to sampling variation. Is this right? If so I guess I should use a one-tailed test???
2006-10-16 10:27:40 · update #1
You are on the right track:
Ho = The new curriculum doesn't make a difference.
H1 = The curriculum will make a difference.
This leads to a two-sided test because your difference could be positive or negative...tail on either side.
Regards,
Mysstere
2006-10-17 06:30:27 · answer #1 · answered by mysstere 5 · 0⤊ 0⤋