Question

The mean annual income of certified welders is normally distributed with a mean of $50,000 and a population standard deviation of $2,000. the ship building association wishes to find out whether their welders earn more or less than $50,000 annually. the alternate hypothesis is that the mean is not $50,000. if the level of significance is 0.10, what is the decision rule?

Answer 1

you can get decision rule by adding these all.... and then 25% of it...