The relationship between mean, median and mode for a moderately skewed distribution is
Mode = 3Median - 2 Mean
Mode = 2 Median - Mean
Mode = 3 Median - 2 Mean
Mode = 2 Median - 3 Mean
The AM of the series 1, 2, 4, 8 ..... 2n is ______.
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 = ________.
7
5
8
10
The variance of the variates 112, 116, 120 125, 132 about their A.M is
58.8
60
48.8
61.8
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 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 =
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
G.M of 4, 5, 20, 25 is
9
11
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 temperature during a month in summer are recorded as ( in F ) 99, 78, 80, 94, 92, 76, 86, 96 . The mediantemperature is
76
99
92
89
