If 96 is the variance of the scores of a batsman in matches played by him. Then the standard deviation is
6.87
9.79
9.98
10.9
One of the method of determining mode is
Mode = 2 median - 3 mean
Mode = 2 median + 3 mean
Mode = 3 median - 2 mean
Mode = 3 median + 2 mean
The marks obtained in chemistry by the 15 students of class XI B are
20, 15, 10, 20 27, 28, 27, 10, 20, 30 35, 40, 41, 41, 20 then the value of mode is
10
20
27
41
If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately?
20.5
22.0
24.0
25. 5
Geometric means of 2, 22, 23, . . . . . 2n is
22/n
2n/2
2n
2(n+1)/2
Find the mean age from the following data Age ( Years ) : 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70Number of person : 3 5 22 30 2 is
50. 70
49 . 70
48 . 70
47. 70
The median of the daily wages of ten worker in Rs. 20, 25, 17, 18, 8, 15, 22, 11, 9, 14 is
15
16
17
18
If in a moderately skewed distribution the value of mode and mean are 6 λ and 9λ respectively, then the value of the median is ______.
8 λ
7 λ
6 λ
5 λ
The median of the observations 2, 30, 12, 25, 20, 8, 10, 4, 15, Is
12
25
The mean of 9 observation is 100 and that of 6 observations is 80, then the combined mean of all 15 observation is
100
92
90
80
