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When tested, the lives (in hours) of 5 b...

When tested, the lives (in hours) of 5 bulbs were noted as follows : 1357, 1090, 1666, 1494, 1623. The mean deviations (in hours) from their mean is :

A

178

B

179

C

220

D

356

Text Solution

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The correct Answer is:
A
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HIMALAYA PUBLICATION-STATISTICS MEASURE OF DIPERSION-QUESTION BANK
  1. The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 from the mean is...

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  2. Mean deviation for n observations x(1), x(2),….., x(n) from their mean...

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  3. When tested, the lives (in hours) of 5 bulbs were noted as follows : 1...

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  4. Following are the marks obtained by 9 students in a Mathematics test :...

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  5. The standard deviation of the data 6, 5, 9, 13, 12, 8, 10 is :

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  6. Let x(1), x(2),….., x(n) be n observations and x be their arithmetic m...

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

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

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

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

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  11. Standard deviations for first 10 natural numbers is :

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

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

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

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

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

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

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

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

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

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