# help with null claim

• Aug 19th 2007, 08:33 PM
mkcar
help with null claim
The question is this... Test the claim about the population mean at the given level of significance using the given sample statistics.

Claim mean> 1030; a = 0.05, sample statistics (xbar) = 1035, s= 23 n = 35. This is what I have and I'm wondering if I have it right. I assumed it was a right tail test with the z test with z(little o) = 1.644. and do not reject the null hypothesis. Does this sound close?
• Aug 19th 2007, 08:43 PM
CaptainBlack
Quote:

Originally Posted by mkcar
The question is this... Test the claim about the population mean at the given level of significance using the given sample statistics.

Claim mean> 1030; a = 0.05, sample statistics (xbar) = 1035, s= 23 n = 35. This is what I have and I'm wondering if I have it right. I assumed it was a right tail test with the z test with z(little o) = 1.644. and do not reject the null hypothesis. Does this sound close?

As the sample size is small, and you are working with the sample SD, you
should be using the t-test, with 34 degrees of freedom.

RonL