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Recent questions tagged analysis-of-frequency-distributions-(correlation-coefficient)

For a perfect correlation between the variables $x$ and $y$ the line of regression is $ ax+by+c=0$ where $a,b,c > 0$ then $ r$ is

asked Feb 1, 2014 by thanvigandhi_1

1 answer

If $ \sigma_x= \sigma_y$ and $x,y$ are related by $u=x+y\: v=x-y$ then $cov (u,v)$ is

asked Jan 31, 2014 by thanvigandhi_1

1 answer

If two variables $x, y$ are related by $ax+by+c=0$ with $ab < 0$ then correlation coefficient between $x$ and $y$ is given by

asked Jan 31, 2014 by thanvigandhi_1

1 answer

The value of covariance of two variable $x$ and $y$ is $- \large\frac{148}{3}$ variance of $x$ is $ \large\frac{272}{3}$ and variance of $y$ is $ \large\frac{131}{3}$. Then coefficient of correlation is

asked Jan 31, 2014 by thanvigandhi_1

1 answer

If the two lines of regression are $ 5x+3y=55$ and $ 7x+y=45$ then find the correlation coefficient between $x$ and $y$

asked Jan 31, 2014 by thanvigandhi_1

1 answer

Given $ n=10, \: \Sigma x = 3,\: \Sigma x^2=8,\: \Sigma y^2=9,\: \Sigma xy=3$ Find correlation coefficient

asked Jan 31, 2014 by thanvigandhi_1

1 answer

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