Homework Statement
given the regression of y on x is 2y-3x=10 and the regression of x on y is 4x-3y=8 find the correlation r between x and y, also find the mean of x and the mean of y.
Homework Equations
The Attempt at a Solution
I am absolutley clueless on this problem, there is...
Homework Statement
use dirichlet test to determine if the series converges 1-1/2-1/3+1/4+1/5-1/6-1/7+...
Homework Equations
The Attempt at a Solution
I have broken up the series into two different series the first series I have is
1+1/4+1/8+1/12+... and the second series I...
Homework Statement
Suppose that {an} is a monotone decreasing sequence of positive numbers. Show that if the series an converges, then the lim(nan)=0.
Homework Equations
The Attempt at a Solution
I started the proof with the fact that since I know the sequence is monotone decreasing and the...