The Two Main Human Blood Group Systems Are the ABO

Multiple Choice

The two main human blood group systems are the ABO and Rhesus (Rh) systems. According to the information of the American Red Cross ("https://www.redcrossblood.org" ) , Rhesus Negative blood type is more rare than Rhesus Positive. A researcher wants to find out if the proportion of people with Rh(-) is equal for each ABO human blood type. The researcher consequently generates 10 random samples of equal size (100 people) four times, and pays attention to the number of people with RhD(-) The results of the blood test are represented in the table below. ​ The researcher notices that the sample means (people per hundred) are very different and he cannot use the null hypothesis . What did the researcher do wrong that he got the data unsuitable for the F-test? Choose the correct statement. What should the researcher do to make it possible to apply the F-test for the study?

A) He should change the null hypothesis to and carry out an ANOVA F-test.
B) He should take more people to the study, since the distributions of ABO group types are not normal.
C) The distribution of people in the ABO types is not normal, and we cannot use the F-test for this distribution.
D) He should generate independent random samples of equal size for each type of ABO blood to avoid the influence of the ABO blood types distribution.