Question

Given the following sample observations, draw a scatter diagram on a separate piece of paper.

      

X:−8−1713416

Y:532471551339

  Click here for the Excel Data File

Compute the correlation coefficient. (Round your answer to 3 decimal places.)

Does the relationship between the variables appear to be linear?

Yes

No

Try squaring the x variable and then determine the correlation coefficient. (Round your answer to 3 decimal places.)

Answer 1

# scatter diagram

#correlation coefficient=r

#using Excell=CORREL(B3:B7,C3:C7)

first drag x value and then y value

##correlation coefficient=r=0.200

#Does the relationship between the variables appear to be linear?

Ansc:

No

#squaring the x variable and then determine the correlation coefficient

Ansd:

##correlation coefficient=r=0.942