If variance of x = 81, variance of y = 64 and covariance of x and y = - 63 , then correlation…
The correlation coefficient is −0.875. The standard deviations are √81 = 9 and √64 = 8, so r = −63 ÷ (9 × 8) = −63/72 = −0.875.
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If variance of x = 81, variance of y = 64 and covariance of x and y = - 63 , then correlation coefficient is :
Answer and explanation
Correct answer C
The correlation coefficient is −0.875. The standard deviations are √81 = 9 and √64 = 8, so r = −63 ÷ (9 × 8) = −63/72 = −0.875.
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Jammu & Kashmir and Ladakh SET (JKSET/LASET)