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If the algebraic sum of deviations of 20...

If the algebraic sum of deviations of 20 observation measured from 23 is 70 mean of these obervations would be

A

30

B

32

C

30.2

D

30.1

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The correct Answer is:
D
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PUNEET DOGRA-STATISTICS-PRE YEAR QUESTIONS
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  4. What is the standard deviation of numbers 7, 9, 11. 13, 15

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  5. The mean of 10 observations is 5. If 2 is added to each observation an...

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  6. The median of 27 observations of a variable is 18 Three more observati...

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  7. Represent the following data by frequency curve :

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  12. Which of the following is measure of dispersion?

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  13. Let X and Y be two related variables. The two regression lines are giv...

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  14. What is the mode for the data 20, 20, 20, 21, 21. 21, 21, 21, 22, 22, ...

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  15. Consider the following statements: 1. Every composite number is a na...

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  16. Consider the following statements: I Two independent variables are a...

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  17. A variate X takes values 2, 9, 3, 7, 5, 4, 3, 2, 10.What is the median...

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  18. What is the arithmetic mean of 16 natural numbers ?

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  19. A variate X-takes values 2. 3. 4. 2. 5. 4 and 2 What is the mode?

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  20. Which one of the following is the mean of the data given below:

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