Basic Statistics 5

1. If $X$ is a constant then $\sum\limits_{i=1}^2 X =$ ___________

2. The mean of 10 numbers is 9, then the sum (total) of these numbers will be

3. If $C= A – B$ then $\overline{C}$ is

4. Step deviation or coding method is used for computation of the

5. The mean of a constant $b$ is

6. For a certain distribution if $\sum(x-2)=18, \sum(x-24)=0, \sum(x-28)=-24$ then arithmetic mean is

7. The variance is zero only if all observations are

8. Arithmetic Mean is __________ affected by extreme values

9. The sum of values divided by their number is called

10. The sample mean ($\overline{X}$) is a

11. The combined arithmetic mean is calculated as

12. Which of the following is least if $\overline{X}=14$

13. __________ is based on all observations of data

14. Sum of deviations will be zero if it is taken from

15. The average of first $n$ natural numbers is

16. A statistics which is not measurable is called:

17. The calculation of mean and variance is based on

18. Arithmetic Mean is __________ affected by extreme values

19. The average of lower and upper class limits is called

20. Arithmetic mean of two positive numbers $X$ and $Y$ is