31. The data contains information on 5 individuals who were made to run an hour
ID: 3276532 • Letter: 3
Question
31. 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, what is the unit in which the sample standard deviation of x is expressed?
Select one:
a. Years squared
b. Days
c. Years
d. No units or unit free
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
If x is expressed in years, what is the unit in which the sample standard deviation of x is expressed?
Correct Answer:
c. Years
Explanation:
We know that the units for the observations, mean, variance, standard deviation or any other statistics is same. The unit of the standard deviation of x will be year if data is expressed in year.
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