Coefficient of range is calculated using the formula
L - S
L + S
For any collection of n items,
n
0
The mean of 9,11,13,p,18,19 is P. Then the value of p is
10
12
14
15
SD of a collection of data is 2√2. If each value is multiplied by 3, then the SD of the new data is
√12
4√2
6√2
9√2
The average age of 5 students is 60 years, then their total age =
300
250
200
400
If t is the standard deviation of x, y, z then the standard deviation of x + 5, y + 5, z + 5 is
3/4
t + 5
t
x y z
The variance of 10,10,10,10 is
√10
5
If the variance of a data is 12.25, then the S.D is
3.5
3
2.5
3.25
For any collection of n, items,
(n - 2)
(n - 1)
If the SD of a set of data is 1.6, then the variance is
0.4
2.56
1.96
0.04
