STAT 245 Lecture Notes - Lecture 50: Minitab, Test Statistic, Null Hypothesis
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Several alternative values of are given in this exercise. (get a minitab output using power calculation and make conclusions to do the followings) 6. 2 d the power curve is shown on the next page. r e w o. You can see that the power becomes greater than or equal to . 90 for a value of a little smaller than. To find the exact value, we need to solve for in the equation: From table 3, the value of z that cuts off . 10 in the lower tail of the z-distribution is z . 9. 78 a the hypothesis to be tested is. 0 and the test statistic is z x. There is sufficient evidence to indicate that the average height for males is greater than females. Males are at least 4. 03 inches taller than females on average. If you check the ratio of the two variances using the rule of thumb given in this section you will find: equal. larger s.
