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Statistics Mcqs

For a symmetrical distribution approximately 68% of the cases are included between _________________?

September 6, 2021May 21, 2019 by admin
For a symmetrical distribution approximately 68% of the cases are included between _________________?

A. X¯¯¯¯−S and X¯¯¯¯+S
B. X¯¯¯¯−2S and X¯¯¯¯+2S
C. X¯¯¯¯−3S and X¯¯¯¯+3S
D. None of these

Categories Basic Statistics Mcqs, Statistics Mcqs

If Y=−8X − 5 and SD of X is 3, then SD of Y is _______________?

September 6, 2021May 21, 2019 by admin
If Y=−8X − 5 and SD of X is 3, then SD of Y is _______________?

A. 8
B. 3
C. 5
D. 24
E. None

Categories Basic Statistics Mcqs, Statistics Mcqs

The variance of a constant is_______________?

September 6, 2021May 21, 2019 by admin
The variance of a constant is_______________?

A. Zero
B. Constant
C. a
D. None

Categories Basic Statistics Mcqs, Statistics Mcqs

Var(2X+3) is________________?

September 6, 2021May 21, 2019 by admin
Var(2X+3) is________________?

A. 5 Var(X)
B. 4 Var(X)
C. 4 Var(X)+3
D. 5 Var(X)+3

Categories Basic Statistics Mcqs, 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______________?

September 6, 2021May 21, 2019 by admin
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

Categories Basic Statistics Mcqs, Statistics Mcqs

The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?

September 6, 2021May 21, 2019 by admin
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

Categories Basic Statistics Mcqs, Statistics Mcqs

The standard deviation is always _________ than mean deviation?

September 6, 2021May 21, 2019 by admin
The standard deviation is always _________ than mean deviation?

A. Greater
B. Less
C. Equal
D. None

Categories Basic Statistics Mcqs, Statistics Mcqs

The measure of Dispersion can never be________________?

September 6, 2021May 21, 2019 by admin
The measure of Dispersion can never be________________?

A. Positive
B. Negative
C. 0
D. 1

Categories Basic Statistics Mcqs, Statistics Mcqs

If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?

September 6, 2021May 21, 2019 by admin
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

Categories Basic Statistics Mcqs, Statistics Mcqs

The first moment about means is always_________________?

September 6, 2021May 21, 2019 by admin
The first moment about means is always_________________?

A. Zero
B. 1
C. Negative
D. None of these

Categories Basic Statistics Mcqs, Statistics Mcqs
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