Question

listed below are blood groups of o, a, b, and ab of randomly selected blood donors. construct the relative frequency distribution.
a o a o o b o o o a
a a o o o a b o o ab
a o o a o b o ab a
complete the relative frequency distribution below.
blood group relative frequency
o %
a %
b %
ab %
(type integers or decimals.)

Explanation:

Step1: Count total number of donors

Count all the blood - group entries. There are 30 donors in total.

Step2: Count number of each blood - group

For blood group O: Count the number of O's. There are 14.
For blood group A: Count the number of A's. There are 12.
For blood group B: Count the number of B's. There are 3.
For blood group AB: Count the number of AB's. There are 1.

Step3: Calculate relative frequencies

Relative frequency of O = $\frac{14}{30}\approx0.467$ or 46.7%
Relative frequency of A = $\frac{12}{30}=0.4$ or 40%
Relative frequency of B = $\frac{3}{30}=0.1$ or 10%
Relative frequency of AB = $\frac{1}{30}\approx0.033$ or 3.3%

Answer:

Blood Group	Relative Frequency
A	40%
B	10%
AB	3.3%