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Let barx be the mean of x1,x2,……,xn and ...

Let `barx` be the mean of `x_1,x_2,……,x_n` and `bary` the mean of `y_1,y_2……,y_n` `barz` is the mean of `x_1,x_2,…. ,x_n, y_1, y_2` is equal to :

A

`(barx+bary)`

B

`1/n(barx+bary)`

C

`1/2(barx+bary)`

D

`1/(2n)(barx+bary)`

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MODERN PUBLICATION-STATISTICS-EXERCISE
  1. Let L be the lower class boundary of a class in a frequency distributi...

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  2. If the mean of the observations : x, x + 3, x + 5, x + 7, x + 10 is 9,...

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  3. Let barx be the mean of x1,x2,……,xn and bary the mean of y1,y2……,yn ba...

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  4. The mean of 100 items was found to be 64. later on, it was discovered ...

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  5. The mean of the following table is 8 The value of p is

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  6. The median of the number 84,78,54,45,68,22,34,45,39,54 is

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  7. Mode of the data 15, 14, 19, 20, 14, 15, 1 6, 14, 15, 18, 14, 19, 15, ...

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  8. In a histogram, each class rectangle is constructed with base as

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  9. A histogram is a pictorail representation of the frequency data in whi...

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  10. In the less than type of ogive the comulative frequency is plotted aga...

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  11. In a histogram the area of each rectangle is proportional to

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  12. In a frequency distribution, gives are graphical represented of

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  13. The class mark of the class 90-120 is

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  14. The range of the data: 27,18,20,16,6,17,15,12,30,32,10,19,8,11,20 is

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  15. In a frequency distribution, the mid value of a class is 10 and width ...

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  16. The width of each of five continuous classes in a frequency distibutio...

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  17. Let m be the mid-point and l be the upper class limit of a class in a ...

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  18. The class marks of a frequency distribution are given as follows : 15,...

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  19. In the class intervals 10-20, 20-30, the number 20 is included in.

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  20. A grouped frequency table with class intervals of equal sizes using 25...

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