Elementary Statistics and Computer Application

Ogives

• Ogives are known also as cumulative frequency curves and there are two kinds of ogives. One is less than ogive and the other is more than ogive.
• Less than ogive : Here the cumulative frequencies are plotted against the upper boundary of respective class interval.
• Greater than ogive: Here the cumulative frequencies are plotted against the lower boundaries of respective class intervals.
Continuous Interval	Mid Point	Frequency	< cumulative Frequency	> cumulative frequency
0-10	5	4	4	29
10-20	15	7	11	25
20-30	25	6	17	18
30-40	35	10	27	12
40-50	45	2	29	2