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11th CBSE
IMPORTANT
Earn 100

S.D. of first n natural numbers is

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Important Questions on Statistics

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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 10
Variance of observations x1, x2, x3, …, xn is given by
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 11
The standard deviation of the data 6, 5 , 9, 13, 12, 8, 10 is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 12
If S.D. of n observations x1, x2, x3,......,xn is σ, then the S.D. of λx1, λx2, λx3,......,λxn is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 13
The mean of 100 observations is 50 and their standard deviation is 5. The sum of squares of all observations is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 14
The coefficient of variation of a distribution with mean x_ and standard deviation (S.D)σ is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 15
The sum of squares of 8 observations is 144 and their mean is 3, then S.D. is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 16
For the following raw data: 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21 the mean deviation about median is
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11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 15 - Statistics>OBJECTIVE TYPE QUESTIONS>Q 17

In a cricket season, the player A scores on average of 50 runs with a standard deviation of 15 runs, the coefficient of variation of the player is given by