|Class 9 Maths Statistics||Ungrouped Frequency Distribution table|
Ungrouped Frequency Distribution table
If you have score of thousands of students, then it is difficult to maintain the data in the table. Also we know that in this case the score may repeat. Multiple students may get same score.
Presentation of data in ascending order can be time consuming when the number off observation in the experiment is very high. Also it will not be human readable. We use ungrouped Frequency distribution table to represent data in such case.
If score of 30 students is given in ascending order
10, 20 ,36 , 36 , 36, 40, 40, 40, 40, 50, 50, 50, 56, 56, 60, 60, 60, 60, 70, 70, 70 ,70 ,72, 80 ,88 ,88 ,92, 92, 92, 95. Presentation of this data in normal table will not be human readable as number of observation is high. We can present this data in Ungrouped Frequency Distribution table.
Number of students who have obtained a certain number of marks is called the frequency of those marks. Eg: 3 students got 36 marks, so frequency for 36 marks is 3.