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If barx is the mean of x1, x2,x2,x3, ………...

If `barx` is the mean of x1, x2,x2,x3, ………..xn , then the mean of x1+a,x2+a, x3+a...xn+a

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If barx is the mean of x1,x2,x3, ………..xn , then for a ne 0, the mean of ax_1,ax_2,…..,ax_n,(x_2)/a, (x_2)/a ,……., (x_n)/a is :

If the mean of x and 1/x is M, then the mean of x^2 and 1//x^2 is

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Given that bar x is the mean and sigma^2 is the variance of n observations x_1, x_2, ... x_n . Prove that the mean and variance of the observations ax_1, ax_2, ... ,ax_n , are a bar x and a^2 sigma^2 respectively (a ne 0) .

MBD-STATISTICS-EXERCISE
  1. If barx is the mean of x1, x2,x2,x3, ………..xn , then the mean of x1+a,x...

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  2. The weights (in kg) of 30 students of a class are 49, 48, 46, 48, 48, ...

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  3. The weights (in kg) of 30 students of a class are 49, 48, 46, 48, 48, ...

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  4. The weights (in kg) of 30 students of a class are 49, 48, 46, 48, 48, ...

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  5. The weights (in kg) of 30 students of a class are 49, 48, 46, 48, 48, ...

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  6. Construct a grouped frequency table with class intervals 0-5, 5 -10 an...

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  7. Construct a grouped frequency table with class intervals 0-5, 5 -10 an...

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  8. Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,...

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  9. Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,...

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  10. Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,...

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  11. Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,...

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  12. A family with monthly income of Rs. 20,000 had planned the following e...

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  13. Consider the following frequency distribution table representing the w...

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  14. The following distribution gives the time taken by 25 students to solv...

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  15. The following table presents the number of literate females in the age...

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  16. For the following data, draw a frequency polygon .

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  17. In a city, the following weekly observations were made in a study on c...

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  18. The following table gives the distribution of IQ (intelligence Quotien...

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  19. A teacher wanted to analyse the performance of two sections of student...

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  20. The mean of 96, 98, x, 102, 104 is 100, find x.

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  21. Find the mean of all possible factors of 20.

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