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The mean deviation of an ungrouped data is 80. If each observation is decreased by 5%, then the new mean deviation is

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Important Questions on Statistics

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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 20
The mean deviation from the mean of the observations a, a+d, a+2d, ……a+2nd is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 21
Mean deviation from the mean for the observations -1, 0, 4 is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 22
If X¯ is the mean of x1, x2, x3……xn. Then the algebraic sum of the deviations about mean X¯ is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 23
If the algebraic sum of deviations of 20 observations from 30 is 20, then the mean of the observation is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 24
The variance of first 20 natural numbers is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 27
The mean of distribution is 4 if coefficient of variation is 58%, then standard deviation of distribution is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 28
The sum of square of deviations for 10 observations taken from mean 50 is 250. The coefficients of variation is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-1>Q 29
Standard deviation is independent of