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**131. The sum of squared deviation is least from_________________?**

A. Median**B. Mean**

C. Mode

D. Standard Deviation

**132. Given the N values in a series, the geometric mean is______________?**

A. The third root of the product of N values

B. The square root of the product of N values

C. The fourth root of the product of N values**D. The Nth root of the product of N values**

**133. In a frequency distribution the last cumulative frequency is 300, Median shall lie in____________?**

A. 140th item

B. 130th item

C. 160th item**D. 150th item**

**134. Find the median of the following datA. 160, 180, 200, 280, 300, 320, 400?**

A. 140

B. 300

C. 180**D. 280**

**135. The average monthly production of a factory for the first 8 months is 2,500 units, and for the next 4 months the production was 1,200 units. The average monthly production of the year will be_____________?**

**A. 2066.55 units**

B. 5031.10 units

C. 4021.12 units

D. 3012.11 units

**136. 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

**137. The mean of 10 numbers is 9, then sum of these numbers will be__________________?**

A. 9

B. 0.9

C. 70**D 90**

**138. Sum of deviations will be zero if it is taken from_________________?**

**A. ****Mean**

B. Mode

C. Median

D. Standard Deviation

**139. The mean of a constant “b” is_________________?**

A. Zero**B. b**

C. None

**140. The average of first n natural numbers is_______________?**

**A. n+12**

B. n2

C. All of the above

D. None of these