HSC Commerce Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Business Mathematics and Statistics

Example for positive correlation is

If the values of two variables move in same direction then the correlation is said to be

If the values of two variables move in the opposite direction then the correlation is said to be

Correlation co-efficient lies between

If r(X,Y) = 0 the variables X and Y are said to be

The correlation coefficient from the following data N = 25, ∑X = 125, ∑Y = 100, ∑X² = 650, ∑Y² = 436, ∑XY = 520

From the following data, N = 11, ∑X = 117, ∑Y = 260, ∑X² = 1313, ∑Y² = 6580, ∑XY = 2827 the correlation coefficient is

The correlation coefficient is

The variable whose value is influenced (or) is to be predicted is called

The variable which influences the values or is used for prediction is called

The correlation coefficient

Scatter diagram of the variate values (X, Y) give the idea about

If two variables moves in decreasing direction then the correlation is

The person suggested a mathematical method for measuring the magnitude of linear relationship between two variables say X and Y is

If r = – 1, then correlation between the variables

The coefficient of correlation describes

If Cov(x, y) = – 16.5, `sigma_"x"^2` = 2.89, `sigma_"y"^2` = 100. Find correlation coefficient.

Find the coefficient of correlation for the following data:

Calculate the coefficient of correlation from the following data:

∑X = 50, ∑Y = – 30, ∑X² = 290, ∑Y² = 300, ∑XY = – 115, N = 10

Calculate the correlation coefficient from the data given below: