Mathematics
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 |
Related Questions
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
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.
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.
Find the mode of following data, using a histogram :
Class Frequency 0 - 10 5 10 - 20 12 20 - 30 20 30 - 40 9 40 - 50 4