During the medical check up of 35 students of a class, their weights were recorded as follows:
Weight (in kg) | No. of students |
Less than 38 | 0 |
Less than 40 | 3 |
Less than 42 | 5 |
Less than 44 | 9 |
Less than 46 | 14 |
Less than 48 | 28 |
Less than 50 | 32 |
Less than 52 | 35 |
Weight (inkg) | No.ofstudents (fi) | cf |
0−38 | 0 | 0 |
38−40 | 3−0=3 | 3 |
40−42 | 5−3=2 | 5 |
42−44 | 9−5=4 | 9 |
44−46 | 14−9=5 | 14 |
46−48 | 28−14=14 | 28 |
48−50 | 32−28=4 | 32 |
50−52 | 35−32=3 | 35 |
∑fi=35 |