If r = 0.7; and n = 64 find out the probable error of the coefficient of correlation.

Compute the probable error assuming the correlation coefficient of 0.8 from a sample of
25 pairs of item

Difference between Correlation and Causation

For some bivarilate data the following result were obtained the two variable X and Y:
x = 53.2, y = 27.9 bvx = - 1.5 bxy = -0.2
The most probable value of y when x = 60 is

If the sum of square of the rank difference in mathematics and physics marks of 10
students is 22, then the coefficient of rank correlation is:

The following data is given on 450 students for marks is statistics and Economic at a
certain examination
Mean marks in statistics = 40
Mean marks in economics = 48
S.D. of marks (statistics) = 12
Variance of marks (Economics) = 256
Sum of the products of deviation of
Marks from their respective mean = 42075
The average marks in economics of candidates who obtained 50 marks in statistics is:

For 10 pair of observation, number of concurrent deviation was found to be 4. what is
the value of the coefficient deviation?

If the coefficient of correlation between x and Y variable is +0. 90 then what will be
coefficient of determination?

The two lines of regression become identical when

There two regression lines passing through

The coefficient of correlation between x and y is 0.6 If x and y value are multiplied by 1 then the coefficient will be

The coefficient of correlation between the temperature of environment and power consumption is always:

Out of the following the one which the regression coefficient is

When the correlation coefficient r is equal to + 1 all the point in a scatter diagram would be

In case of ``Insurance companies” profit and the number of claim they have to pay there is -----correlation.

The percent of told variation of the dependent variable Y explained by the set of independent variables X is measured by:

A coefficient of correlation is computed to be -0.95 means that

Let the coefficient of determination computed to be 0.39 in a problem involving one independent variable and one dependent variable this result means that 

Relationship between correlation coefficient and coefficient of determination is that:

For a bivariate data two lines of regression are 40 x – 18y = 214 and 8x – 10y + 66 = 0 then find the value of x and y

The table below shows the number of absence x, in a calculsis course and the final exam grade y for 7 student find the correlation coefficient

Two regression lines are parallel to each other if their slope is 

When regression line passes through the origin then

The table below shows the number of absence, x in a calculate course and the final exam grand, y for 7 student find the correlation coefficient

If two variables oppose each other than the correlation will be

If the model points are a scatter diagram is evenly distributed then the correlation is:

If the plotted points in a scatter are evenly distributed, then the correlations zero. The covariance between variable is

In the method of concurrent deviations only the directions of change (positive direction/ Negative direction) in the variable are taken into account for calculation of

Correlation coefficient is----of the units of measurement

In case speed of an automatic and the distance required to stop the car after applying correlation is