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Question

Draw a scatter diagram and indicate the nature of correlation.

X1020304050607080Y510152025303540

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Solution

The pair of points are (10,5), (20,10), (30,15), (40,20), (50,25), (60,30), (70,35) and (80,40).
Now, we plot the points on a graph paper which is shown below:



Interpretation The diagram indicates that there is perfect positive correlation between the values of the two variables X and Y.


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