statistics help, calculating confidence limits and performing a students t test

have a look on youtube, there will be videos that show you how to di it excel.

hope that helps

this is quite easy to follow ?

http://www.ltcconline.net/greenl/courses/201/hyptest/diff.htm

bump.

Main problem I'm having right now, how to know how many degrees of freedom to use? nothing seems to tell me.

Are you doing a two-sample t test?

What test statistic are you using?

Two tailed t test yes

I don't know what you mean by the second question

Does this look familiar at all:




If so, the degrees of freedom is n1+n2-2 (=13+13-2)

No not at all. Not been taught any of this stuff, so assume that I know literally nothing about statistics.

Have you done any similar examples like this? Or done any theory for two sample t-tests?

If you haven't, then this is what I have in my notes and I think this is what you're supposed to use:

No.

And honestly that is all just complete gibberish to me, I don't understand any of it. Like the equations and stuff, no idea what they mean.

I think you may need to speak to your lecturers and ask them what they are expecting.

But to try and explain what I have posted:
s1=4.7
s2=20.3
x̄1=94.7
x̄2=40.4
n1=13
n2=13

You literally just put those numbers first into the formula for s first, and then put those numbers and the value for s into the value for t and test that on 24 degrees of freedom.

thanks for trying.

I've run out of time to get help from lecturers as it's due tomorrow. They don't reply to emails, they don't answer questions when you ask them. I think I'll just fail that question. I literally can't do it. I've had maths teachers tell me I'm stupid for over ten years. Sick of it.

Considering you're doing something that I've been taught in the second year of my maths degree, you obviously aren't stupid!! Sorry I couldn't help anymore.