R. A. Fisher has derived the sampling distribution of the correlation coefficient defined in Eq. (3.5.13). xy
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If it is assumed that the variables X and Y are jointly normally distributed, that is, if they come from a bivariate normal distribution , then under the assumption that the population correlation coefficient Ï is zero, it can be shown that t = r (n 2)/ (1 r2) follows Students t distribution with n 2 df.** Show that this t value is identical with the t value given in Eq. (5.3.2) under the null hypothesis that β2 = 0. Hence establish that under the same null hypothesis F = t2.
Eq (5.3.2) : t = (βÌ2 β2) Σxi2 / ÏÌ
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