81.
Which of the following measures of dispersion is independent of the units employed?
A
Coefficient of variation
B
Quartile deviation
C
Standard deviation
D
Range
Loading practice questions
85 practice sets · Page 5 of 5
Which of the following measures of dispersion is independent of the units employed?
Coefficient of variation
Quartile deviation
Standard deviation
Range
If = Rs.20, S= Rs.10, then coefficient of variation is:
45%
50%
60%
65%
Var(X) = 4 and Var(Y) =9. If X and Y are independent random variable then Var(2X + Y) is:
13
17
25
-1
If standard deviation of the values 2, 4, 6, 8 is 2.236, then standard deviation of the values 4, 8,12, 16 is:
4.472
4.236
2.236
An automobile manufacturer obtains data concerning the sales of six of its deals in the last week of 1996. The results indicate the standard deviation of their sales equals 6 autos. If this is so, the variance of their sales equals:
Square root of 6
6
(1/square root of 6)
36