1.
The range of the first 10 prime numbers 2,3,4,7,11,13,17, 19,23,29 is
A. 
B. 
C. 
D. 
2.
The least value in a collection of data is 14.1 . If the range of the collection is 28.4, then the greatest value of the collection is
A. 
B. 
C. 
D. 
3.
The greatest value in a collection of data is 72 and the least value
is 28.then the coefficient of range is
A. 
B. 
C. 
D. 
4.
For a collection of 11 items ∑x =132, then the arithmetic mean is
A. 
B. 
C. 
D. 
5.
For any collection of n items , ∑(x- ) =
A. 
B. 
C. 
D. 
6.
For any collection of n items , (∑x)- =
A. 
B. 
C. 
D. 
7.
If t is the standard deviation of x,y,z, then the standard deviation of x+5,y+5,z+5 is
A. 
B. 
C. 
D. 
8.
If the standard deviation of a set of data is 1.6, then the variance is
A. 
B. 
C. 
D. 
9.
If the variance of a data is 12.25,then the S.D is
A. 
B. 
C. 
D. 
10.
Variance of the first 11 natural numbers is
A. 
B. 
C. 
D. 
11.
The Variance of 10,10,10,10,10 is
A. 
B. 
C. 
D. 
12.
If the variance of 14,18,22,26,30 is 32, then the variance of 28,36,44,52,60 is
A. 
B. 
C. 
D. 
13.
Standard deviation of a collection of data is 2 . If each value is multiplied by 3,then the standard deviation of the new data is
A. 
B. 
C. 
D. 
14.
Given∑ (X- )2 = 48 , =20 and n=12. The coefficient of variation is
A. 
B. 
C. 
D. 
15.
Mean and Standard deviation of a data are 48 and 12 respectively.
The coefficient of variation is
A. 
B. 
C. 
D.