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The following table shows marks in econ...

The following table shows marks in economics of the students of a class. Calculate arithmetic mean.
`{:("Marks",,"Number of Students"),("More than 0",," "30),("More than 2",," "28),("More than 4",," "24),("More than 6",," "18),("More than 8",," "10):}`

Text Solution

Verified by Experts

Converting Cumulative Frequency Distribution into a Simple Frequency Distribution, we get the following:

Arithmetic mean of this continuous series is estimated below, using Direct Method.

`barX=(sumfm)/(sumf)=(190)/(30)=6.33`
Arithmetic Mean = 6.33 marks.
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TARUN JAIN & VK OHRI-MEASURES OF CENTRAL TENDENCY - ARITHMETIC MEAN-Illustration
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  2. Marks in Statistics of the students of Class XI are given below. Fin...

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  3. The following table shows marks in economics of the students of a cla...

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  4. Following table gives marks in Statistics of the students of a class. ...

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  5. The following table shows monthly pocket expenses of the students of a...

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  6. Mean marks obtained by 100 students are estimated to be 40. Later on i...

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  7. Suppose mean of a series of 5 items is 30. Four values are, 10,15,30 a...

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  8. Calculate weighted mean of the following data: {:("Marks(X)",81,76,7...

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  9. 60 students of Section A of Class XI, obtained 40 mean marks in Statis...

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  10. In the following frequency distribution, the frequency of the class i...

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  11. If the arithmetic mean of the following series is 115.86, find the mis...

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  12. Follwing are the marks obtained by 8 students in Statistics. Calcula...

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  13. Following are the marks obtained by 25 students in economics. Find o...

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  14. Calculate mean salary by Step-deviation Method of the following data:

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  15. Calculate mean from the following data: {:("Marks",10-20,10-30,10-40...

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  16. A train runs 25 miles at a speed of 30 mph, another 50 miles at a spee...

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  17. If the average salary of a firm is Rs. 400 and the number of workers ...

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  18. The mean of 5 observations is 7. Later on, it was found that two obser...

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  19. The mean monthly salary paid to all employees in a certain company was...

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  20. Find the missing information in the following table: {:(,,A,,B,,C,,"...

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