Statistics.. Which Test Do I Use in This Situation? T Test?
Question by Vivian: Statistics.. which test do i use in this situation? t test?
a company wanted to test the effectiveness of this drug, which lowers cholesterol. before and after data was given to me so i could solve the effectiveness. 100 elderly men and women (50/50) from washington D.C. were tested in pre and post tests. one of the questions is “how effective is this drug in lowering overall cholesterol?”
the data consists of mg/dl, which is the unit for measuring cholesterol
i thought that a paired t-test would work… but now i’m not sure!
what do you think?
oh yeah.. it’s in excel
OMG YES.. there are two questions:
is this drug more effect with men than women?
is age a factor regarding the effectiveness?!
what test do i use for these two questions?
Best answer:
Answer by LioNiNoiL
if the data are normally-distibuted (check with a normality test) then a paired-sample t-test should answer the first (of the three) questions — whether the drug is effective — the mean cholesterol “after” is significantly less than that “before”.
provided the sample variances are equivalent, the second question (of the three) can be answered with a two-sample t-test: cholesterol decrease (“before” minus “after”) among men versus that among women.
again, if the data are normally-distibuted, the third question can also be answered with a paired-sample t-test of cholesterol decrease paired with age.
Know better? Leave your own answer in the comments!
Drug Abuse – AIDS – How do teenage girls communicate? By texting of course. We created the “dialogue” between teens by having them use their phones while voicing over what was on their minds. The context allowed for an emotional connect between the girls and the story. The entire cast was formed out of auditions by real teens attending a performance high school in Washington DC. They get it, it’s their world. We even had them come in during editorial to comment; after all, they were the target audience. Director: Bryan Elsom MRB FIlms Creative Content Studio www.mrbfilms.com