UGC NET COMMERCE June 2019 Q8

8If two regression coefficients are –0.8 and –0.2, then the value of coefficient of correlation is:

Option : D
Explanation : Since the coefficient of correlation is the G.M. between the regression coefficients, therefore,

Since r has the same sign as the two regression coefficients, so r must be –ve.
Hence, r = –0.4.

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