- #1

TheBlackAdder

Gold Member

- 97

- 56

## Main Question or Discussion Point

Is it possible to reject the null hypothesis without calculating the z-score? We estimated the

—>2*

Therefore there is a 95% confidence interval between

**0.95**(=1.05 - 0.1) and

**1.15**(=1.05+0.1)

So we can say we are 95% confident that the μ

_{x}(of the drug administered rats) is between 0.95 and 1.15. Therefore we can reject the hypothesis because μ of the non-drug-rats is 1.2, which falls outside of the 95%.

Is this reasoning correct?