Broken Post Count?

[Jacobi]

Now run a two-proportion z-interval on the difference between proportion of helpful posts between regular users and non-regular users (e.g. admin, mod, etc.)

Are you using a simple random sample??
If you are considering the average over all regular members, how would you filter posts?
Finally, are you sure that you do not want a 2-sample t-test of average proportion helpful posts between the two groups (excluding 0-post members)?

Yes, I mean a t-test. And sure, a simple random sample would work.

Are you or were you in AP Stats?

[UTF-8 U+6211 U+662F]

Are you using a simple random sample??
If you are considering the average over all regular members, how would you filter posts?
Finally, are you sure that you do not want a 2-sample t-test of average proportion helpful posts between the two groups (excluding 0-post members)?

Yes, I mean a t-test. And sure, a simple random sample would work.

Are you or were you in AP Stats?

yep

[Things2do]

Yes, I mean a t-test. And sure, a simple random sample would work.

Are you or were you in AP Stats?

yep

I don't have enough time for that... But if you're gonna go to that trouble, you'll want a bunch of random samples.
I'm in Introductory Statistics at the community college.