Two sample t test with a raw dataset

LordAlex — Sun, 24 Jan 2010 21:04:53 GMT

I have a raw dataset of a bunch of cereals and many other variables of them. One variable is the manufacturer, so that column is sorted into K, G, B, etc. (The variable for each manufacturer). I have another variable of fat. I need to test the hypothesis that General Mills (G) has a higher fat content than Kellogs (K). How would I do this? I know I need to use the ttest procedure, but I don't know how. Please note I only have to compare the fat contents of those two manufacturers, which are variables randomly in the dataset as well. Thanks.

Re: Two sample t test with a raw dataset

plf515 — Mon, 25 Jan 2010 11:27:07 GMT

> I have a raw dataset of a bunch of cereals and many
> other variables of them. One variable is the
> manufacturer, so that column is sorted into K, G, B,
> etc. (The variable for each manufacturer). I have
> another variable of fat. I need to test the
> hypothesis that General Mills (G) has a higher fat
> content than Kellogs (K). How would I do this? I know
> I need to use the ttest procedure, but I don't know
> how. Please note I only have to compare the fat
> contents of those two manufacturers, which are
> variables randomly in the dataset as well. Thanks.

Assuming BRAND is the name of your cereal

proc ttest data = mydata;
class brand;
var fat;
where brand = 'G' or brand = 'K';
run;

ought to work

Peter

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Two sample t test with a raw dataset

Re: Two sample t test with a raw dataset