Finding Lower Critical F Values For hypothesis tests that were twotailed, the methods of

Chapter 9, Problem 21

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Finding Lower Critical F Values For hypothesis tests that were twotailed, the methods of Part 1 require that we need to find only the upper critical value. Let's denote that value by F R , where the subscript indicates the critical value for the right tail. The lower critical value F L (for the left tail) can be found as follows: First interchange the degrees of freedom used for finding F R , then take the reciprocal of the F value found in Table A5. Using a significance level of 0.05, find the critical values F L and F R for a twotailed hypothesis test with sample sizes of n 1 = 10 and n 2 = 21.