Homework Sourseif I hope to reject Ho why should I hope that the estimated
if I hope to reject Ho, why should I hope that the (estimated) variance of Xbar is small?
if I hope to reject Ho, why should I hope that the (estimated) variance of Xbar is small?
if I hope to reject Ho, why should I hope that the (estimated) variance of Xbar is small?
Solution
When the variance of the Xbar is small then there is a high chance to reject H0. i.e., the Confidence interval for the mean at a certain level of significance will be very narrower when the variance is small
