G.M of 4, 5, 20, 25 is
8
9
10
11
The central value of the set of observations is called
Mean
Median
Mode
G.M
The mean of the squares of first n natural numbers is
1/8 n ( n + 1 )
1/6 n ( 2n +1 )
1/6 ( n + 1 ) ( 2n + 1 )
The range of following set of observations : 2, 3, 5, 9, 8, 7, 6, 5, 7, 4, 3, is
7
5.5
6
The AM of the series 1, 2, 4, 8 ..... 2n is
The variance of the variates 112, 116, 120 125, 132 about their A.M is
58.8
60
48.8
61.8
Geometric means of 2, 22, 23, . . . . . 2n is
22/n
2n/2
If x and y are two variables such that
1/2
- 1/2
1/4
- 1/4
The harmonic mean of the numbers 2, 3, 4 is _______.
3
( 24 )1/3
36/13
13/36
