Workers productivity can be different if they use different type of machines. Number of units produced by a group of five workers who use different types of machines are provided in the following table: Worker Machine type A B C D 46 40 49 38 2 48 42 54 45 3 36 38 46 34 4 45 40 48 35 5 40 44 51 41 Using ANOVA, % significance level and following six steps process of hypothesis testing, test whether there exists any difference in productivity among the workers