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A variable assumes the values x1, x2,……....

A variable assumes the values `x_1`, `x_2`,……..,`x^_n` with frequencies `f_1`, `f_2`,………,`f_n` In respectively, show that `overset(n)underset(i=1)sum f_i(x_i - barx) = 0`.

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UNITED BOOK HOUSE-Jadavpur Vidyapith, Question Paper -Exercise
  1. Class width of a class interval is defined as

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  2. A line diagram is used to represent.

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  3. Harmonic mean of 1, 1/2 and 1/3

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  4. Standard deviation of 1, 2, 3, 4, 5 is 2. Then standard deviation of (...

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  5. if 3y + 4x = 8 and QD(y) = 12, then value of QD(x) is

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  6. Define primary data with an example.

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  7. Define class boundary.

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  8. Name the various parts of a table.

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  9. What are represented along the horizontal axis and vertical axis in dr...

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  10. A variable assumes the values x1, x2,……..,x^n with frequencies f1, f2,...

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  11. Mean and median of a frequency distribution are 24 and 26.5 respective...

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  12. In a frequency distribution having 6 class intervals the total frequen...

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  13. If arithmetic mean and coefficient of variation of a variable x are 10...

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  14. Discuss Questionnaire Method and Interviewer Method.

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  15. Discuss the method of drawing a Histogram with an example.

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  16. If G1, G2 and G denotes GM of the first group, GM of the second group ...

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  17. If SD of first n odd positive integers is sqrt133, find n.

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  18. Give an example of intensive variable.

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  19. Find the mean deviation about mean of two values x1 and x2.

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  20. Express standard deviation of the composite group in terms of number o...

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