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
7
The variance of the variates 112, 116, 120 125, 132 about their A.M is
58.8
60
48.8
61.8
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 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
G.M of 4, 5, 20, 25 is ______.
11
G.M of 4, 5, 20, 25 is
In a moderately skewed distribution the value of mean and median are 5 and 6 respectively. Then the value of mode is _______.
16
21
One of the methods of determining mode is ______.
mode = 2 median - 3 mean
mode = 2 median + 3 mean
mode = 3 median - 2 mean
mode = 3 median + 2 mean
If the two lines of regression of a bivariate distribution coincide, then the correlation coefficient ρ satisfies?
ρ = 0
ρ > 0
ρ < 0
ρ = 1 or -1
Which of the following is not a measure of dispersion______.
Variance
Mean Deviation
Standard Deviation
Mode
