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33. The data contains information on 5 individuals who were made to run an hour

ID: 3303150 • Letter: 3

Question

33. The data contains information on 5 individuals who were made to run an hour after consuming an energy drink. xdenotes each individual’s age and y denotes the distance covered by each individual (non-stop).

Obs. No.

x (age in years)

y(meters run)

1

10

112

2

12

100

3

56

89

4

59

78

5

62

43

(xi - x)2 = 2784.8 (yi - y)2 = 2781.2

If x is expressed in years and y is expressed in meters, what is the unit in which the sample correlation coefficient between x and y is expressed?

Select one:

a. Meters*Years

b. Meters squared*Years squared

c. No units or unit free

d. Square root of meters* Square root of years

Obs. No.

x (age in years)

y(meters run)

1

10

112

2

12

100

3

56

89

4

59

78

5

62

43

Explanation / Answer

Sample correlation coefficient is basically an indicator of linear relationship and it is a unitless quantity.

Hence,

Option C is correct.

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