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Some observations are arranged in the as...

Some observations are arranged in the ascending order as 9, a +3, a +7, 20, 23 and 26. If the median of the data is 18.5, find the value of a. Also find the mean of the data.

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The correct Answer is:
a = 10, mean = 18
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KUMAR PRAKASHAN-STATISTICS-SKILL TESTING EXERCISE
  1. The weights (in kg) of 30 girls of Primestreet Society are as below: ...

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  2. The marks scored by 40 students in a 60 mark test of english are as fo...

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  3. The information on the height (in cm) of 30 children is given below : ...

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  4. The following data on the number of girls (to the nearest ten) per tho...

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  5. Draw a histogram for the frequency distribution :

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  6. 100 surnames were randomly picked up from a local telephone directory ...

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  7. Draw a frequency polygon for the following frequency distribution :

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  8. The weight (in kg) of seven students are given below: 35, 30, 42, 36, ...

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  9. The information regarding the marks scored by 30 students in a 20 mark...

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  10. The height (in cm) of 100 students of a school are tabulated below: ...

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  11. Find the median of the observations 13, 9, 15, 8, 6, 3.

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  12. Find the median of the observations 12, 41, 34, 26. 31, 22, 10.

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  13. Find the mode of the observations 17, 10, 13, 18, 22, 13, 26, 9, 13, 1...

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  14. Find the mode of the observations 25, 20, 16, 12, 20, 16, 19, 23, 31, ...

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  15. Find the mean, the median and the mode of the observations 24, 12, 15,...

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  16. Some observations are arranged in the ascending order as 9, a +3, a +7...

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  17. The mean of 5 observations is 20. Including one new observation, the m...

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  18. The mean of 10 observations is 28. If 2 is added to each observation a...

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  19. Find the mean of the following frequency distribution:

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  20. If the mean of the following frequency distribution is 26.7, find the ...

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