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If overlineX(1),overlineX(2) are the me...

If `overlineX_(1),overlineX_(2)` are the means of two distributions such that `overlineX_(1)ltoverlineX_(2)andoverlineX` is mean of the combined distribution , then

A

`overlineXltoverlineX_(1)`

B

`overlineXgtoverlineX_(2)`

C

`overlineX=(overlineX_(1)+overlineX_(2))/(2)`

D

`overlineX_(1)ltoverlineXltoverlineX_(2)`

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NEW JOYTHI PUBLICATION-STATISTICS-EXSERCISE
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  2. The AM of the squares of the first 'n' natural numbers is

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  3. If overlineX(1),overlineX(2) are the means of two distributions such ...

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  4. A variable X is expressed as a linear function of two variables u and ...

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  5. The mean of a set of numbers is overline(x) . If each number is incre...

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  6. The mean of a set of numbers is overlinex. If each observation is div...

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  7. The algebraic sum of the deviations from the mean is

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  8. The median of the series is 10 . Two additional observations 7 and 20...

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  9. The range of the data 41,68,7,53,4,75,11,89,47 is

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  10. The mean and variance of 7 observations are 8 and 16 respectively . If...

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  11. Variance is independent of

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  12. If the S.D of 0,1,2,….9 is a, then the S.D of 10,11,12,…. 19 is

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  13. The mode of the obeservations 3,5,1,7,9,1,12 is

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  14. The AM of 1,2,4,8 …… 2^(n) is

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  15. If a variable takes the values 0,1,2,…. N with frequencies 1,""^(n)C(1...

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  16. The GM of 2, 2^(2),2^(3).......2^(n) is

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  17. The mean mark in statistics of 100 students in a class was 72. The mea...

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  18. The AM of the nnumbers x(1),x(2)......x(n) is M. If x(1) is replaced b...

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  19. The MD from the median for the observed values -1,0,4 is

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  20. If each observation of a raw data whose variance sigma^(2) is multipli...

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