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
Geometric means of 2, 22, 23, . . . . . 2n is
22/n
2n/2
2n
2(n+1)/2
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
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 mean deviation from the observations 3, 8, 12, 19, 20 is
6.5
7.9
8.5
9.7
The arithmetic mean of n number of a series is . If the sum of first ( n - 1 ) number is K then the nth number is
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
The means of the series 1, 2, 4, 8, - - - - 2n is
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 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
