Write down the methods of measurement of correlation.
Methods of measurement of correlation : (i) Scatter diagram, (ii) Graphic method, (iii) Karl Pearson’s coefficient of correlation, (iv) Spearman’s rank difference method.
The range of simple correlation coefficient is:
If rxy is positive the relation between X an Y is of the type:
If rxy = 0 the variable X and Y are:
Of the following three measures which can measure any type of relationship:
If precisely measured data are available the simple correlation coefficient is:
Why is r preferrred to co-variance as a measure of association?
Can r lie outside -1 and 1 range depending on the type of data?
Does correlation imply causation?
When is rank correlation more precise than simple correlation coefficient?
Does zero correlation mean independenc?
Mock Test Series
