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The S.D of 7 scores 1, 2, 3, 4, 5, 6, 7,...

The S.D of 7 scores 1, 2, 3, 4, 5, 6, 7, is

A

4

B

2

C

`sqrt7`

D

none of these

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The correct Answer is:
B
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Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find A'

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Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (A ∪ C)′

Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (A ∪ B)′

Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (A′)′

Let U = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }, A = { 1, 2, 3, 4}, B = { 2, 4, 6, 8 } and C = { 3, 4, 5, 6 } . Find (B – C)′

Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and A = {1, 3, 5, 7, 9} . Find A′.

If a digit is chosen at random from the digits 1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7,\ 8,\ 9 , then the probability that the digit is even, is (a) 4/9 (b) 5/9 (c) 1/9 (d) 2/3

PATHFINDER-STATISTICS AND MATHEMATICAL REASONING-QUESTION BANK
  1. The mean for the observation 1, 2, 3,4 is

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  2. The variance of 2, 4, 6, 8, 10, is

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  3. The S.D of 7 scores 1, 2, 3, 4, 5, 6, 7, is

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  4. If the standard deviation of 1, 2, 3, 4,…., 10 is sigma , then the sta...

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  5. S.D. of numbers observation a1, a2, a3,…..an is sigma then the S.D. of...

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  6. If each observation of a raw data whose variance is sigma^2 is increas...

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  7. Let sigma be the standard deviation of n observations. Each of the n o...

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  8. For a frequency distribution, standard deviation is computed by

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  9. Mean of first n natural numbers is

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  10. (x1-overlinex)+(x2-overlinex)+....+(xn-overlinex)=

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  11. If the mean of the table is 8, then find the value of P.

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  12. A factory employs 100 workers of whom 60 in the first shift and 40 wo...

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  13. Geometric mean of 3, 9 and 27 is

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  14. The median of the items 6, 10, 4, 3, 11, 22, 18, is

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  15. If median = (mode + 2 mean ) Mean, then Mean is equal to

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  16. The scores of a batsman in ten innings are : 38, 70, 48, 34, 42, 55, 6...

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  17. The Standard Deviation of scores 1, 2, 3, 4, 5 is

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  18. If the mean of the first n odd natural numbers be numbers itself, then...

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  19. The A.M of the series 1, 2, 4, 8, 16…., 2^n is

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  20. If the mean of the numbers x1, x2, x3,….xn is overlinex, then the mea...

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