A researcher studying genetic influences on learning compares the maze performance of four genetically different strains of mice, using eight mice per strain. Performance for the four strains were as follows: Strain Mean S J 41 3.5 M 38 4.6 Q 14 3.8 W 37 4.9 Using the Ul significance level, is there an overall difference in maze performance among the four strains? (a) Use the steps of hypothesis testing; (b) sketch the distributions involved