Eduprobe
Question:
The blood groups of 30 students of Class VIII are recorded as follows: A, B, O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O. Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?
Solution:
The data is represented in the form of a frequency distribution table by listing each type of observation and its occurrence/frequency in the data set. The frequency distribution table is shown below for the given data.
| Blood Group | Frequency |
|---|---|
| A | 9 |
| B | 6 |
| O | 12 |
| AB | 3 |
Most common blood group = Highest frequency of the blood group = O (12 students)
Rarest blood group = Least frequency of the blood group = AB (3 students)