If the S.D. of n observations `x_1,x_2,x_3.......x_n` is 4.and another set of n observations `y_1,y_2.y_3......y_n` ,is 3 the S.D. of n observations `x_1-y_1,x_2-y_2,x_3-y_3......................x_n-y_n` is

If the standard deviation of n observation x_(1), x_(2),…….,x_(n) is 5 and for another set of n observation y_(1), y_(2),………., y_(n) is 4, then the standard deviation of n observation x_(1)-y_(1), x_(2)-y_(2),………….,x_(n)-y_(n) is

If the standard deviation of n observation x_(1), x_(2),…….,x_(n) is 5 and for another set of n observation y_(1), y_(2),………., y_(n) is 4, then the standard deviation of n observation x_(1)-y_(1), x_(2)-y_(2),………….,x_(n)-y_(n) is

S.D. of the observation x_1, x_2, x_3 ..... x_n is 3.5 then S.D. of -2x _1-3,-2x_2-3,.........-2x_(n)-3 is ….........

The standard deviation of n observation x_(1),x_(2),……x_(n) is 6. The standard deviation of another set of n observations y_(1),y_(2),………..y_(n) is 8. What is the standard deviation of n observations x_(1)-y_(2),x_(2)-y_(2),………..,x_(n)-y_(n) ?

The geometric mean of the observation x_(1),x_(2),x_(3),……..,_(n) is G_(1) , The geometric mean of the observation y_(1),y_(2),y_(3),…..y_(n) is G_(2) . The geometric mean of observations (x_(1))/(y_(1)),(x_(2))/(y_(2)),(x_(3))/(y_(3)),……(x_(n))/(y_(n)) us

Let barx be the mean of x_1,x_2,.....x_3 and bary be the mean of y_1,y_2,....,y_n . If barz is the mean of x_1,x_2,.....,x_n,y_1,y_2,....y_n , then barz =

If x_1,x_2,x_3 as well as y_1, y_2, y_3 are in G.P. with same common ratio, then prove that the points (x_1, y_1),(x_2,y_2),a n d(x_3, y_3) are collinear.

If x_1,x_2,x_3 as well as y_1, y_2, y_3 are in G.P. with same common ratio, then prove that the points (x_1, y_1),(x_2,y_2),a n d(x_3, y_3) are collinear.

If x_1,x_2,x_3 as well as y_1, y_2, y_3 are in G.P. with same common ratio, then prove that the points (x_1, y_1),(x_2,y_2),a n d(x_3, y_3) are collinear.