Can someone explain how to find the sample mean variance when the sample size, mean and population standard deviation are given?

10/23/2006 5:08:30 PM

Are you talking about #2?

If so, take the Population Variance and divide it by the Sample Size. That's it.

[Edited on October 23, 2006 at 5:47 PM. Reason : Added stuff]

10/23/2006 5:42:57 PM

variance is the sum of the squared deviations

so with each sample, find the difference between it and the average

square all of those differences and add them up

[Edited on October 23, 2006 at 5:58 PM. Reason : jank]

10/23/2006 5:57:15 PM

One last thing, how about finding the variance of difference in sample means?

Thanks

10/23/2006 7:37:49 PM

[Edited on October 23, 2006 at 7:48 PM. Reason : http://courses.ncsu.edu/bus350/common/dutton/wrap/lessons.html]

10/23/2006 7:48:12 PM

I need help with problems 5,6 and 7 of the webassign due tonight.

I'll give $10 to someone to help me finish this webassign.

Message me and we'll go from there.

11/1/2006 10:55:06 AM