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x1,x2,x3,….xn then (x1-barx)+(x2-barx)+(...

`x_1,x_2,x_3,….x_n` then `(x_1-barx)+(x_2-barx)+(x_n-barx)=0.`

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prove that if the variance of the observations x_1,x_2,x_3,…….,x_n is sigma^2 then the variance of x_1+a,x_2 +a, x_3 + a,………….., x_n + a is sigma^2 .

Given that bar(x) is the mean and sigma^(2) is the variance of n observation x_(1), x_(2), …x_(n). Prove that the mean and sigma^(2) is the variance of n observations ax_(1),ax_(2), ax_(3),….ax_(n) are abar(x) and a^(2)sigma^(2) , respectively, (ane0) .

x_1,x_2, x_3,………., x_n are n observations . sum_(i=1)^(n) (x_i - 2) = 100 " and " sum_(i=1)^(n) (x_i - 5) = 20 then mean barx = …….

S.D. of the observation x_1, x_2, x_3 ..... x_n is 3.5 then S.D. of -2x _1-3,-2x_2-3,.........-2x_(n)-3 is ….........

Mean deviation for n observation x_1,x_2,……….,x_n from their mean barx is given by …….

If x_(1),x_(2),x_(3),…,x_(n) are the roots of the equation x^(n)+ax+b=0 , the value of (x_(1)-x_(2))(x_(1)-x_(3))(x_(1)-x_(4))…….(x_(1)-x_(n)) is

Let x_1, x_2 ,…………,x_n be n observations and barx be their arithmetic mean. The formula for the standard deviation is given by ……….. .

Let a sequence x_(1),x_(2),x_(3),… of complex numbers be defined by x_(1)=0, x_(n+1)=x_(n)^(2)-i for all n >1 , where i^(2)=-1 . Find the distance of x_(2000) from x_(1997) in the complex plane.

int_(0)^(1)x(1-x)^(n)dx

KUMAR PRAKASHAN-OBJECTIVE SECTION AS PER NEW PAPER SCHEME -Statistics (True/False Statement)
  1. Marks obtained by 10 students in exam of 70 Marks are as follows. 53,4...

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  2. Numbers of observation of the data is n (where n is even) then median ...

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  3. Median of nine observations is 20.45 . If 2 is added in last four obse...

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  4. Let a,b,c,d,e be the observations with mean m and standard deviation S...

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  5. Mean is the measure of dispersion.

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  6. Co-efficient of variance of one data is 45% and mean is 12 then S.D. i...

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  7. x1,x2,x3,….xn then (x1-barx)+(x2-barx)+(xn-barx)=0.

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  8. For an data if n = 10, sumx1=40,sumxi^2=250 then standard deviation s ...

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  9. variance of 6 observation is 250 then sum(xi-barx)^2=1200.

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  10. a,b,c and d are 4 observations . Their mean and median is zero then b ...

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  11. Marks obtained by 10 students in exam of 70 Marks are as follows. 53,4...

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  12. Numbers of observation of the data is n (where n is even) then median ...

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  13. Median of nine observations is 20.45 . If 2 is added in last four obse...

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  14. Let a,b,c,d,e be the observations with mean m and standard deviation S...

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  15. Mean is the measure of dispersion.

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  16. Co-efficient of variance of one data is 45% and mean is 12 then S.D. i...

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  17. x1,x2,x3,….xn then (x1-barx)+(x2-barx)+(xn-barx)=0.

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  18. For an data if n = 10, sumx1=40,sumxi^2=250 then standard deviation s ...

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  19. variance of 6 observation is 250 then sum(xi-barx)^2=1200.

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  20. a,b,c and d are 4 observations . Their mean and median is zero then b ...

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    |