In an experiment to determine the effect of catalyst on the yield of a certain reaction, the mean yields for reactions run with each of four catalysts were = 89.88, = 89.51, = 86.98, and = 85.79. Assume that five runs were made with each catalyst.

a. If MSE = 3.85, compute the value of the F statistic for testing the null hypothesis that all four catalysts have the same mean yield. Can this null hypothesis be rejected at the 5% level?

b. Use the Tukey-Kramer method to determine which pairs of catalysts, if any, may be concluded to differ at the 5% level.

Week 3 Notes Tuesday, September 6, 201611:06 AM Important Points ○ LimitingReagent:Reactant used up first in the reaction ○ Theoretical Yield: Is the amount of productthat would result if all the limiting reagent reacted MAXIMUMobtainable result ○ Actual Yield is the amount of product actually obtained out of a reaction. • More on Titrations...