Mathematics
The weight of 60 boys are given in the following distribution table :
| Weight (kg) | No. of boys |
|---|---|
| 37 | 10 |
| 38 | 14 |
| 39 | 18 |
| 40 | 12 |
| 41 | 6 |
Find :
(i) Median
(ii) Lower quartile
(iii) Upper quartile
(iv) Inter quartile range.
Related Questions
The weights (in kg) of 10 students of a class are given below :
21, 28.5, 20.5, 24, 25.5, 22, 27.5, 28, 21 and 24. Find the median of their weights.
The marks obtained by 19 students of a class are given below :
27, 36, 22, 31, 25, 26, 33, 24, 37, 32, 29, 28, 36, 35, 27, 26, 32, 35 and 28. Find:
(i) Median
(ii) lower quartile
(iii) Upper quartile
(iv) Inter-quartile range
From the following cumulative frequency table draw ogive and then use it to find :
(i) Median
(ii) Lower quartile
(iii) Upper quartile
Marks (less than) Cumulative frequency 10 5 20 24 30 37 40 40 50 42 60 48 70 70 80 77 90 79 100 80 In a school, 100 pupils have heights as tabulated below :
Height (in cm) No. of pupils 121 - 130 12 131 - 140 16 141 - 150 30 151 - 160 20 161 - 170 14 171 - 180 8 Find the median height by drawing an ogive.