Basic Statistics Mcqs - Set 2

1)   The sum of squared deviation is least from_________________?

a. Median
b. Mean
c. Mode
d. Standard Deviation
Answer  Explanation 

ANSWER: Mean

Explanation:
No explanation is available for this question!


2)   The average of first n natural numbers is_______________?

a. n+12
b. n2
c. All of the above
d. None of these
Answer  Explanation 

ANSWER: n+12

Explanation:
No explanation is available for this question!


3)   The mean of a constant “b” is_________________?

a. Zero
b. b
c. None
Answer  Explanation 

ANSWER: b

Explanation:
No explanation is available for this question!


4)   Sum of deviations will be zero if it is taken from_________________?

a. Mean
b. Mode
c. Median
d. Standard Deviation
Answer  Explanation 

ANSWER: Mean

Explanation:
No explanation is available for this question!


5)   The mean of 10 numbers is 9, then sum of these numbers will be__________________?

a. 9
b. 0.9
c. 70
d. 90
Answer  Explanation 

ANSWER: 90

Explanation:
No explanation is available for this question!


6)   For a certain distribution if ∑(x−2)=18,∑(x−24)=0,∑(x−28)=−24) then arithmetic mean is_______________?

a. 21
b. 24
c. 28
d. 0
Answer  Explanation 

ANSWER: 24

Explanation:
No explanation is available for this question!


7)   Arithmetic mean of two positive numbers “X” and “Y” is_________________?

a. ab2
b. 2a2
c. (a+b)/2
d. a−b2
e. 2a+b
Answer  Explanation 

ANSWER: (a+b)/2

Explanation:
No explanation is available for this question!


8)   The calculation of mean and variance is based on______________?

a. Small values only
b. Large values only
c. Extreme values only
d. All values
Answer  Explanation 

ANSWER: All values

Explanation:
No explanation is available for this question!


9)   If β2=m4m22<3, the distribution is called______________?

a. Normal
b. Mesokurtic
c. Leptokurtic
d. Platykurtic
Answer  Explanation 

ANSWER: Platykurtic

Explanation:
No explanation is available for this question!


10)   The degree of peakedness is called__________________?

a. Dispersion
b. Skewness
c. Symmetry
d. Kurtosis
Answer  Explanation 

ANSWER: Kurtosis

Explanation:
No explanation is available for this question!


11)   Quartile Coefficient of skewness lies between______________?

a. 0 and 1
b. -1 and +1
c. -1 and 0
d. None of these
Answer  Explanation 

ANSWER: -1 and +1

Explanation:
No explanation is available for this question!


12)   If the third moment about mean is zero then distribution is_______________?

a. Mesokurtic
b. Positively Skewed
c. Symmetrical
d. Negatively Skewed
Answer  Explanation 

ANSWER: Symmetrical

Explanation:
No explanation is available for this question!


13)   ____________ is used to criterion of consistency i.e for consistence performance?

a. Range
b. Standard Deviation
c. Coefficient of Variation
d. Mean Deviation
Answer  Explanation 

ANSWER: Coefficient of Variation

Explanation:
No explanation is available for this question!


14)   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
Answer  Explanation 

ANSWER: X¯¯¯¯−S and X¯¯¯¯+S

Explanation:
No explanation is available for this question!


15)   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
Answer  Explanation 

ANSWER: 24

Explanation:
No explanation is available for this question!


16)   The variance of a constant is_______________?

a. Zero
b. Constant
c. a
d. None
Answer  Explanation 

ANSWER: Zero

Explanation:
No explanation is available for this question!


17)   Var(2X+3) is________________?

a. 5 Var(X)
b. 4 Var(X)
c. 4 Var(X)+3
d. 5 Var(X)+3
Answer  Explanation 

ANSWER: 4 Var(X)

Explanation:
No explanation is available for this question!


18)   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. 60
Answer  Explanation 

ANSWER: 50

Explanation:
No explanation is available for this question!


19)   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
Answer  Explanation 

ANSWER: 2.5

Explanation:
No explanation is available for this question!


20)   The standard deviation is always _________ than mean deviation?

a. Greater
b. Less
c. Equal
d. None
Answer  Explanation 

ANSWER: Greater

Explanation:
No explanation is available for this question!