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In a study to test the effectiveness of ...

In a study to test the effectiveness of new variety of seeds, an experiment was performed with 50 experimental fields and the following results were obtained :
Find the variance and standard deviation.

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MODERN PUBLICATION-STATISTICS-EXERCISE
  1. The diameters of circles (in mm) drawn in a design are given below : ...

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  2. From the data given below, state which group is more variable :

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  3. In a study to test the effectiveness of new variety of seeds, an exper...

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  4. The weights of a group of children at 6 month are given below: Find...

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  5. In the study of 79 diabetic patients, the following data are obtained....

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  6. Two plants A and B of a factory show following results about the numbe...

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  7. The following values are calculated in respect of heights and weights ...

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  8. The sum and sum of squares corresponding to length x (in cm) and weigh...

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  9. From the data given below, state which group is more variable, A or B ...

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  10. From the prices of shares X and Y below, find out which is more stable...

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  11. The following is the record of goals scored by team A in a football se...

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  12. The mean of first 11 terms of Fibonacci sequence : 1,1,2, 3, 5, 8, 13,...

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  13. If each of the observations x1, x2, ....xn is increased by an amount ‘...

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  14. Find the mean and standard deviation for the following data :

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  15. Find the average earnings (using step-deviation method) and the standa...

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  16. The yields of wheat for 50 experimental fields are given below. Find t...

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  17. The mean and standard deviation of marks obtained by 50 students of a ...

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  18. From a frequency distribution consisting of 18 observations, the mean ...

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  19. The mean and standard deviation of 20 observations are found to be 10 ...

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  20. The mean and standard deviation of 20 observations are found to be 10 ...

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