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Let `x_(1), x_(2), x_(3), x_(4), x_(5)` be the observations with mean m and standard deviation s. The standard deviation of the observations `kx_(1), kx_(2), kx_(3), kx_(4), kx_(5)` is :

A

k + s

B

s/k

C

ks

D

s

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The correct Answer is:
C
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HIMALAYA PUBLICATION-STATISTICS MEASURE OF DIPERSION-QUESTION BANK
  1. Let x(1), x(2),….., x(n) be n observations and x be their arithmetic m...

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  2. The mean of 100 observations is 50 and their standard deviation is 5. ...

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  3. Let a, b, c, d, e be the observations with mean m and standard deviati...

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  4. Let x(1), x(2), ….., x(n) be n observations. Let w(i) = lx(i) + k for ...

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  5. Let x(1), x(2), x(3), x(4), x(5) be the observations with mean m and s...

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  6. Standard deviations for first 10 natural numbers is :

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  7. Consider the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. If 1 is added to e...

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  8. The following information relates to a sample of size 60 : sum x^(2) =...

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  9. Coefficients of variation of two distributions are 50 and 60, and thei...

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  10. The standard deviation of some temperature data in overset C is 5. If...

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  11. In an experiment with 15 observations on x, the following results were...

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  12. In a series of 2n observations, half of them equal to a and remaining ...

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  13. Suppose a population A has 100 observations 101, 102, …., 200 and anot...

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  14. If the mean deviation of the numbers : 1, 1 + d, 1 + 2d, ….., 1 + 100d...

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  15. For two data sets, each of size 5, the variances are given to be 4 and...

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  16. The sum of the squares of deviations for 10 observations taken from th...

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  17. The measure of dispersion is

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  18. The S.D. of 5 scores 1, 2, 3, 4, 5 is :

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  19. The variance of the first n natural numbers is :

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  20. A batsman scores runs in 10 innings as 38, 70, 48, 34, 42, 55, 63, 46,...

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