Graphically, the median and mode can be determined using a cumulative frequency curve (ogive) or histogram. The median is found by locating the point corresponding to the 50th percentile in the cumulative frequency curve, and the mode is identified as the highest point of the histogram. However, the mean is an algebraic concept that requires the sum of the data values and the number of values, which cannot be directly obtained from a graphical representation. Thus, the mean cannot be determined graphically.
The correct option is (A): Mean
Find the mean and mode of the following data:
Class | 15--20 | 20--25 | 25--30 | 30--35 | 35--40 | 40--45 |
Frequency | 12 | 10 | 15 | 11 | 7 | 5 |