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Find the mean, and standard deviation fo...

Find the mean, and standard deviation for the following data: (i) Year render: 10 20 30 40 50 60 No. of persons (cumulative): 15 32 51 78 97 109

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RD SHARMA ENGLISH-STATISTICS-All Questions
  1. If a is positive integer and the frequency distribution: x : , A, 2a, ...

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  2. There are 60 students in a class. The following is the frequency dis...

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  3. Find the mean, and standard deviation for the following data: (i) Y...

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  4. Find the mean and standard deviation of first n terms of an A.P. whose...

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  5. Find the mean of the following frequency distribution: Variable (xi)...

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  6. Calculate the variance and standard deviation from the data given b...

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  7. Find the variance and standard deviation for the following distribu...

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  8. Find the standard deviation for the following data: (i) x : , 3, 8, 13...

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  9. Calculate the mean and standard deviation for the following distrib...

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  10. Let x1, x2, ,xn be xn observations. Let yi=a xi+b for i=1,2,...,n wher...

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  11. For a frequency distribution standard deviation is computed by applyin...

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  12. The mean of 100 numbers observations is 50 and their standards devia...

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  13. If n=10 , X =12 and sumx(i)^2=1530 , then the coefficient of variati...

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  14. Life of bulbs produced by two factories A and B are given below: Le...

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  15. If the standard deviation of a variable X \ is \ sigma , then standard...

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  16. Following are the marks obtained, out of 100, by two students Ravi and...

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  17. Let a, b, c, d, e, be the observations with m and standard deviation s...

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  18. The lengths (in cm) of 10 rods in a shop are given below: 40.0,52.3,55...

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  19. If the S.D. of a set of observations is 8 and if each observation is ...

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  20. The standard deviation of the observations 6,5,9,13,12,8,10 is 6 (b) ...

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