Math Help Forum - View Single Post - 2-sided alternative hypothesis

larz · #3 June 27th, 2009, 03:22 PM

I didn't understand that either. My book seems to use that for the two sided hypotheses when finding the confidence interval. Is there a different formula I should use? or the same without dividing $\alpha$ by 2.

The critical region equation for hypotheses one mean and variance unknown written in the book for H1: $\mu$ does not equal $\mu_{0}$ is $|\bar{x}-\mu_{0}| \ge t_{\frac{\alpha}{2}}(n-1)\frac{s}{\sqrt{n}}$