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A variable X is expressed as a linear fu...

A variable X is expressed as a linear function of two variables u and v in the form X = au +bv.
Then the mean `overlineX` of X is

A

`aoverlineu+boverlinev`

B

`overlineu+overlinev`

C

`boverlineu+aoverlinev`

D

`ab(overlineu+overlinev),(a+b)(overlineu+overlinev)`

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

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

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

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

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

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

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

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

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

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  10. Variance is independent of

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

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  13. The AM of 1,2,4,8 …… 2^(n) is

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

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

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

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

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

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

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  20. If each observation of a new data where variance is sigma^(2) increas...

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