Var(2X+3) is________________?
A. 5 Var(X)
B. 4 Var(X)
C. 4 Var(X)+3
D. 5 Var(X)+3
Basic Statistics Mcqs
Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be______________?
Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be______________?
A. 50
B. 70
C. 50/20
D. 50-20 = 30
E. 50
The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?
The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?
A. 20
B. 5
C. 2.5
D. 5.5
E. 0
The standard deviation is always _________ than mean deviation?
The standard deviation is always _________ than mean deviation?
A. Greater
B. Less
C. Equal
D. None
The measure of Dispersion can never be________________?
The measure of Dispersion can never be________________?
A. Positive
B. Negative
C. 0
D. 1
If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?
If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?
A. 100%
B. 25%
C. 20%
D. None of these
The first moment about means is always_________________?
The first moment about means is always_________________?
A. Zero
B. 1
C. Negative
D. None of these
Lack of symmetry is called_______________?
Lack of symmetry is called_______________?
A. Absolute Dispersion
B. Relative Dispersion
C. Skewness
D. Non of these
If right tail is longer than left tail then distribution is called _________________?
If right tail is longer than left tail then distribution is called _________________?
A. Negatively Skewed
B. Positively Skewed
C. All of above
D. None of these
______________is based on all observations of data?
______________is based on all observations of data?
A. Median
B. Mode
C. Mean
D. None of these