CI for difference between means

#1
Control: n=13, Mean=32.77, StDev=32.77, SEMean=3.328
Treatment: n=16, Mean=42.01, StDev=17.2, SEMean=4.3

Point Estimate for treatment - control = 9.24
df = 27

What is the 98% CI?

I calculated the ME as 13.45 and the CI as (-4.21, 22.69)

Is this correct?
 

Dason

Ambassador to the humans
#3
Since you've posted a couple of questions in the past few minutes I'm going to post this here:

Hi! :welcome: We are glad that you posted here! This looks like a homework question though. Our homework help policy can be found here. We mainly just want to see what you have tried so far and that you have put some effort into the problem. I would also suggest checking out this thread for some guidelines on smart posting behavior that can help you get answers that are better much more quickly.
 
#4
Thank you, I'm trying to get everything sorted out before my final. I'm unfortunately not as prepared as I'd like to be going into the test. Hopefully I can get help on some hw questions and tie up the loose ends.