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Coefficient of range 5, 2, 4, 3, 8, 11 is

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Important Questions on Statistics

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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 9
If difference between mean and mode is 3, the difference between mean and median is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 10

Mode of the data:

xi (variate) frequency
C14 C08
C24 C28
C34 C48
C44 C68

 

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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 11
If ∑i=111xi-4=11 and ∑i=111xi-42=44, then find variance of x1, x2, x3…..x11.
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 12
Mean of 1, 4, 7, 10, 13  .....up to n terms is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 13
If varxi=λ, then var2xi+3 is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 14
If S. D. of x1, x2, x3….xn is 3, then S. D. of -4x1, -4x2………..-4xn is
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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 15

Consider the following statement and choose the correct option:

(I) Variance can not be negative

(ii) S.D. cannot be negative

(III) Median is influenced by extreme value in the set of numbers

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Alpha Question Bank for Engineering: Mathematics>Chapter 23 - Statistics>Exercise-4>Q 16
The mean and variance of 7 observation are 7 and 1007. If 5 of the observation are 2, 4, 7, 11, 10, find the remaining 2 observations.