The AM of the series 1, 2, 4, 8 ..... 2n is ______.
The range of following set of observations : 2, 3, 5, 9, 8, 7, 6, 5, 7, 4, 3, is
11
7
5.5
6
For the following data, mean of x is found to be 7.3. The missing frequency is ______ x: 5 6 7 8 9 f : 4 6 12 - 8
10
9
8
Co - variance ( x, y ) between a x and y if Σx = 15, Σ y = 40, Σ xy = 110, n = 5 is _______.
22
-2
2
-22
In a moderately skewed distribution the value of mean and median are 5 and 6 respectively. Then the value of mode is _______.
16
21
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
n2/2
1/8 n ( n + 1 )
1/6 n ( 2n +1 )
1/6 ( n + 1 ) ( 2n + 1 )
The temperature during a month in summer are record as ( in F ) 99, 78, 80, 94, 92, 76, 86, 96 The median temperature is _______.
76
99
92
89
The AM of three sizes 3, 4 and 2.5 weighted respectively by the numbers 15, 5 and x is found to be 3. Then x = ________.
5
The AM of three sizes 3, 4 and 2.5 weighted respectively by the numbers 15, 5 and x is found to be 3. Then x =
