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21 If Ho: M 2 199 (claim), Ha: mu 2, alpha =.10, x bar , = 520, x bar 2 = 510, sigma, = 30, sigma2 = 20, n, = 100, n2 = 80, calculate the test statistic & the standardized test statistic. 23 In a 2 tail test of the difference between means for large independent samples, if s1 = 13,000, $2 = 15,000, n, = 100, n2 = 49 calculate the standard error 24 For a 2 sample t test for the difference between means, if n, = 14 and n2 = 17, what is d.f. ? If the variances are equal. If the variances are not equal. 25 For a right tailed t test for the difference between means if a = .10, d-bar = 1.880, Ha = 0, So = 3.30, n = 25, calculate t THE END