Calculate the mean of the following frequency distribution :
Class : | 10-30 | 30-50 | 50-70 | 70-90 | 90-110 | 110-130 |
Frequency : | 5 | 8 | 12 | 20 | 3 | 2 |
Class | 10-30 | 30-50 | 50-70 | 70-90 | 90-110 | 110-130 |
Frequency , y | 5 | 8 | 12 | 20 | 3 | 2 |
Mean of class (x) | 20 | 40 | 60 | 80 | 100 | 120 |
fx | 320 | 720 | 1600 | 300 | 240 |
Mean
Mean
Mean