Correlation

Following are the elements of correlation except

• There should be three or more variables

• There should be only curvilinear relations among variables

• There should be relationship among them

• The change in the value of one affects another

Two variables are said to be positively correlated when with _____ in the value of one variable, the value of other variable also _____

• Fall, Rises

• Fall , falls

• No change, Rises

• Rise , Falls

If with the fall in the value of one variable the value of another variable rises in the same proportion then it is said to be

• None

• Both

• Negatively correlated

• Positively correlated

If the coefficient correlation exactly equals to -1 then it will be effect

• Simple correlation

• Positive correlation

• Negative correlation

• Multiple correlation

When the correlation is only studied between two variables it is called

• Simple correlation

• Positive correlation

• Multiple correlation

• Negative correlation

Multiple correlation is

• When the correlation is only studied between four variables

• When the correlation is studied between three or more variables

• When the correlation is only studied between two variables

• When the correlation is only studied between three variables

If the ratio of change between the two variables is a constant then there will be

• Linear correlation

• Non-linear correlation

• Negative correlation

• Positive correlation

Correlation coefficient is denoted by

• co

• r

• l

• c

Who was a great biometrician and statistician?

• Kally Pearson

• Kaerl Pearson

• Karl Pearson

• Kal Pearson

When r = 1, there is perfect

• None

• perfect -ve relationship between the variables

• perfect +ve relationship between the variables

• no relationship between the variables