N 1 S 2 Sigma 2 Chi Squared
B X has a Nµσ2n distribution. 121 - One Variance. Solved It Was Shown In Class That The Random Variable Z Chegg Com Then the sampling distribution of the sample variance is given by a chi-squared distribution with n1 n 1 degrees of freedom. . Statistics and Probability questions and answers. So the numerator in the first term of W can be written as a function of the sample variance. It was shown in class that the random variable z s2 n - 1sigma2 possesses a chi-squared distribution with n - 1 degrees of freedom where s2 is the sample variance 2 resulting from a random sample of size n from normal distribution with variance sigma2. If Xi χ21 and the Xi are independent then ni 1Xi χ2n. Step 3 Level of Significance. Make stats easy today with 1 stats help. Because S is greater than σ this is a right tail test so df 11-110. Sigma 2 textright-tailed Step 2 Test Statistic. N 1S2s2 then the mgf of the sum on the ...