微信扫一扫
实时资讯全掌握
|
Roy Fisher, CFA, wants to determine whether there is a significant difference, at the 5% significance level, between the mean monthly return on Stock GHI and the mean monthly return on Stock JKL. Fisher assumes the variances of the two stocks’ returns are equal. Using the last 12 months of returns on each stock, Fisher calculates a t-statistic of 2.0 for a test of equality of means. Based on this result, Fisher’s test: A. rejects the null hypothesis, and Fisher can conclude that the means are equal. B. rejects the null hypothesis, and Fisher can conclude that the means are not equal. C. fails to reject the null hypothesis. |