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Marks of 12 students in a unit test are ...

Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, 10, 20, 19, 12, 20, 14, Assume a mean and calculate the arithmetic mean of the data. Assume another number as mean and calculate the arithmetic mean again. Do you get the same result? Comment.

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VGS PUBLICATION-BRILLIANT-FREQUENCY DISTRIBUTION TABLES AND GRAPHS-EXERCISE
  1. Find the sum of deviations of all ob servations of the data 5, 8, 10, ...

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  2. If sum of the 20 deviations from the ‘mean is 100, then find the mean ...

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  3. Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, ...

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  4. Arithmetic mean of marks (out of 25) scored by 10 students was 15. One...

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  5. The sum of deviations of ‘n’ observa tions from 25 is 25 and sum of de...

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  6. Find the median of the data:3.3, 3.5, 3.1, 3.7, 3.2, 3.8

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  7. Find the Median for the following data 30, 17, 12, 21, 33, 22 Ascendi...

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  8. Find the mode of 10, 12, 11, 10, 15,20, 19, 21, 11, 9, 10.

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  9. Mode of certain scores is x. If each score is decreased by 3, then fin...

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  10. Find the mode of all digits used in writing the natural numbers from 1...

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  11. Observations of a raw data are 5,28,15, 10, 15, 8, 24. Add, four more ...

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  12. If the mean of a set of observationsx1, x2 x10 is 20. Find the mean of...

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  13. The median of the data x/5, x, x/4, x/2 and x/8 is 8. Find the value o...

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  14. The median of a set of 9 distinct observations is 20.5. If each of the...

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  15. Make a frequency distribution of the following series. 1, 2, 2, 3, 3, ...

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  16. Construct a frequency distribution for the following series of numbers...

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  17. Write the mark wise frequencies in the following frequency distributio...

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  18. The following marks achieved by 30 candidates in mathematics of SSC ex...

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  19. Cumulative frequency curves are called as ......... curves.

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  20. Greater than cumulative frequency is related to

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