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A Class of 40 students is divided into f...

A Class of 40 students is divided into four groups named as A, B, C and D. Group-wise percentage of marks scored by them are given below in the table.
`{:(A,B,C,D),(20,42,10,21),(30,51,25,69),(40,45,85,70),(25,58,73,86),(22,53,98,53),(45,64,43,68),(65,72,64,99):}`
By using the coefficient of range find which of the group has shown good performance.

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
B
(i) Find the coefficient of range of A, B, C and D and compare.
(ii) `"Coefficient of range" = ("Maximum value - Minimum value")/("Maximum Value + Minimum value")`
(iii) Find the coefficient of range of A, B, C and D.
(iv) The least coefficient of range implies good perfprmance.
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PEARSON IIT JEE FOUNDATION-STATISTICS-LEVEL-3
  1. A Class of 40 students is divided into four groups named as A, B, C an...

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  2. Life (in hour) of 10 bulbs from each of four different companies A, B,...

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  3. If the mode of the observations 5, 4, 4, 3, 5, x, 3, 4, 3, 5, 4, 3 an...

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  4. In a colony, the average age of the boys is 14 years and the average a...

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  5. Find the median of the following data. {:("Class Interval",f),(" "0...

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  6. In a class of 20 students, 10 boys brought 11 books each and 6 girls b...

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  7. The mean of a set of 20 observations is 8 an another set of 30 observa...

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  8. Find the approximate value of mean deviation about the mode of the fol...

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  9. The mean of the following distribution is 4. Find the value of q. {:...

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  10. If the ratio of mean and median of a certain data is 5 : 7, then find ...

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  11. Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8...

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  12. Find the median of the following data. {:(x,12,15,18,21,24),(f,4,7,2...

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  13. Find the mean deviation about the median for the following data. {:(...

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  14. Find the mode for the following data. {:("Class Interval",f),(" "0-...

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  15. Find the quartile deviation of the following discrete series. {:(x,8...

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  16. Find the arithmetic mean of the observations x + 5, x + 6, x + 10, x +...

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  17. Find the mode of the following discrete series. {:(x,1,2,3,4,5,6,7,8...

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  18. Find the mean of the following continuous distribution. {("Class Int...

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  19. Which of the following is not changed for the observations 31, 48, 50,...

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