Q.23 :-There are two series of index numbers, P for price index
and S for stock of a commodity. The mean and standard
deviation of P are 100 and 8 and of S are 103 and 4 respectivel
The correlation coefficient between the two series is 0.4. With
these data, work out a linear equation to read off values of P fo
various values of S. Can the same equation be used to read off
values of S for various values of P?
Statement A: P = 83 + 0.2 S is the regression equation to read
off values of P for various values S
Statement B: P = 17.6 + 0.8 S is the regression equation to read
off values of P for various values S
Statement C: to read off values of S for various values of P we
use another regression equation
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