An engineer in charge of a production process that produces a stain for outdoor decks has designed a study to test the research hypothesis that an additive to the stain will produce an increase in the...

An engineer in charge of a production process that produces a stain for outdoor decks has designed a study to test the research hypothesis that an additive to the stain will produce an increase in the ability of the stain to resist water absorption. The mean absorption rate of the stain without the additive is 40 units. The enginner places that stain with the additive on n=50 pieces of decking material and records y=36.5 and s=13.1. Let μ denote the mean absorption rate of the stain. You must state the null hypothesis and the alternative hypothesis. Use a=0.05