Question

The Two lines of regression are given by 8x+10y = 24 and 16x+5y = 12 respectively .
If the variance of x is 25 ,what is the standard deviation of y

Answer 1

Answer:

as the value of x is given as 25

thus,

$8 \times 25 + 10y = 24 \\ 200 + 10y = 24 \\ 24 - 200 = 10y \\ - 176 = 10y = y = - 17.6$

as same will be done for the other one also