a random sample of size n=16 is obtain from a normally distribution population with a population mean =100 and variance =25.

a)wat is the probability that the sample variance is greater than 45.

Question

a random sample of size n=16 is obtain from a normally distribution population with a population mean =100 and variance =25.

a)wat is the probability that the sample variance is greater than 45.

amistre64 · Answer

this sounds like .... mean of them means type thing to me

amistre64 · Answer

http://uscdistancelearning.com/statistics/chapter10/variance.html this might be a good prep for the question at least

amistre64 · Answer

i never did go over any chi square stuff in elementary stats ....

valpey · Answer

You can use a Chi-Squared distribution with n-1 degrees of freedom. You are looking for the right-tailed probability that you will observe a value of (n-1)*45/25.

valpey · Answer

I sort of misstated that. I mean the right-tailed probability of a Chi-Squared distribution with n-1 degrees of freedom where x > (n-1)*45/25.

valpey · Answer

Do you have a table for Chi-Squared distributions, or Microsoft Excel?