The unit of correlation coefficient between height in feet and weight in kgs is:

• kg/feet

   

• percentage

• non-existent

The range of simple correlation coefficient is:

 

• 0 to infinity

   

• Minus one to plus one

   

•  Minus infinity to infinity

If r_xy is positive the relation between X an Y is of the type:

• When Y increases X increases

   

• When Y decreases X increases

•  When Y increases X does not change

If r_xy = 0 the variable X and Y are:

 

•  Linearly related

   

• Not linearly related

• Independent