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**121. Quartile Coefficient of skewness lies between______________?**

A. 0 and 1**B. -1 and +1**

C. -1 and 0

D. None of these

**122. The degree of peakedness is called__________________?**

A. Dispersion

B. Skewness

C. Symmetry**D. Kurtosis**

**123. If β2=m4m22<3, the distribution is called______________?**

A. Normal

B. Mesokurtic

C. Leptokurtic**D. Platykurtic**

**124. The calculation of mean and variance is based on______________?**

A. Small values only

B. Large values only

C. Extreme values only**D. All values**

**125. Arithmetic mean of two positive numbers “X” and “Y” is_________________?**

A. ab2

B. 2a2**C. (a+b)/2**

D. a−b2

E. 2a+b

**126. The variance of a constant is_______________?**

**A. Zero**

B. Constant

C. a

D. None

**127. 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

**128. 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

**129. ____________ is used to criterion of consistency i.e for consistence performance?**

A. Range

B. Standard Deviation**C. Coefficient of Variation**

D. Mean Deviation

**130. If the third moment about mean is zero then distribution is_______________?**

A. Mesokurtic

B. Positively Skewed**C. Symmetrical**

D. Negatively Skewed