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The heights of 50 students, measured to ...

The heights of 50 students, measured to the nearest centimetres have been found to be as follows:

(i) Represent the data given above by a grouped frequency distribution table, taking class intervals as 160-165, 165-170 etc.
(ii) What can you conclude about their heights from the table ?

Text Solution

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(i) We condense the given data into group like (150-155), (155-160)…..
Now, the given data can be taken as under

(ii) From the table, our conclusion is that more than 50% of students (i.e., `12+9+14=35`) are shorter than 165 cm.
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NAGEEN PRAKASHAN ENGLISH-STATISTICS-Problems From NCERT/exemplar
  1. The distance (in km) of 40 engineers from their residence to their pla...

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  2. The heights of 50 students, measured to the nearest centimetres have b...

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  3. A study was conducted to find out the concentration of sulphur dioxide...

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  4. The value of pi upto 50 decimal places is given below 3.141592653589...

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  5. The truth table given below represents

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  6. The length of 40 leaves of a plant measured correct to one millimetre ...

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  7. The following table gives the life times of 400 neon lamps: (i) Repr...

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  8. The following table gives the distribution of students of two sections...

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  9. The runs scored by two teams A and B on the first 60 balls in a cricke...

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  10. A random survey of the number of children of various are groups playin...

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  11. 100 surnames were randomly picked up from a local telephone directory ...

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  12. The mean of five numbers is 30. If one number is excluded, their mean ...

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  13. If the mean of the observation x, x+3, x+5, x+7 and x+10 is 9, then me...

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  14. The mean deviation for n observations x1, x2, , xn from their mean ...

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  15. If each observation of the data is increased by 5, then their mean

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  16. Let barx be the mean of x(1), x(2), ………, x(n) and bary be the mean of ...

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  17. If barx is the mean of x(1), x(2), …………., x(n), then for a ne 0, the m...

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  18. If barx1,barx2,barx3,...barxn are the means of n groups with n1,n2,n3,...

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  19. The mean of 100 observation is 50. If one of the observation which was...

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  20. There are 50 numbers. Each number is subtracted from 53 and the mean o...

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