The weights of tea in 70 packets are shown in the following table :
| Weight (in grams) | Number of packets |
| 200-201 201-202 202-203 203-204 204-205 205-206 |
13 27 18 10 1 1 |
Draw the less than type ogive for this data and use it to find the median weight.
Answer. [201.8]
Solution.
| Weight | cf |
| Less than 201 | 13 |
| Less than 202 | 27+13=40 |
| Less than 203 | 40+18=58 |
| Less than 204 | 58+10=68 |
| Less than 205 | 68+1 =69 |
| Less than 206 | 69+1 = 70 |
Hence the median is 201.8