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Value of an Expression

Given the fol...

Question

Given the following pair of values of the variables X and Y:

X 8 10 12 11 9 7 13 14 15

Y 5 7 9 8 6 4 10 11 12

Also describe relationship between X and Y.

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Solution

Thus, there is a perfect positive correlation between X and Y.

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Q. From the following data, calculate coefficient correlation between the variables X and Y using Karl Pearson's method:

X	10	6	9	10	12	13	11	9
Y	9	4	6	9	11	13	8	4

Q. Making use of the data given below, calculate the coefficient of correlation.

X	10	6	9	10	12	13	11	9
Y	9	4	6	9	11	13	8	4

Q. Calculate coefficient of correlation of the following data:

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Y	9	4	6	9	11	13	8	4

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Q. Make a scattered diagram of the data given below. Does any relationship exist between the two?

X	4	5	6	7	8	9	10	11	12	13	14	15
Y	78	72	66	60	54	48	42	36	30	24	18	12

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