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
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
The mean age of the combined group of men and women is 25 years. If the mean age of the group of men is 26 and
that of the women is 21, then the percentage of men and women in the group is
60, 40
80, 20
20, 80
40, 60
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 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
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 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
If 10 is the mean of a set of 7 observation and 5 is the mean of a st of 3 observations, then the mean of the combined set is
15
8.5
7.5
The median of marks of 9 student in a class are 34, 32, 48, 38, 24, 30, 27, 21, 35 is
30
32
34
38
Geometric means of 2, 22, 23, . . . . . 2n is
22/n
2n/2
2n
2(n+1)/2
