They should not complain about bad treatment because the South is still recovering from the war.
<u>Explanation:</u>
At the wartime, African played a crucial role in America getting independent. In that time, they faced oppression, then they saw an opportunity to break free from slavery and unfair behaviour.
During the war, blacks fought for both the sides which so ever can help them in gaining freedom in when a new country is created. Black history and the south suffered a lot from racial discrimination.
Blacks have even tried to find a place in private or a working sector. their struggle is very long and hard. They have always fought for their survival. If America was able to get free from Britain than southern black has been so important in doing it.
The answer would be : by comparing the DNA from the test using the Kastle-Meyer test. Kastle-Mayer test is used to detect possible presence of hemoglobin in the DNA. This results could be compared to the Law enforcement's database to find out the one's who is involved in the crime scene
A-B-A-B design could provide the most valid non intervention measure with demonstration of experimental control.
In statistics, the experimental design, also known as the design of experiment (DOE), is described as the layout of an information-gathering experiment in which a variation may or may not be present. Typically, controlled experiments use this phrase. In order to make the results more reliable, these tests minimize the impacts of the variable. In this design, a group of people, plants, animals, etc. may participate in an experimental unit's procedure.
Pre-experimental research designs are the most straightforward kind of experimental research designs in statistics. Following the identification of some factors as causes and effects, a group or groups are kept under observation in this method. Typically, this approach is used to determine whether the targeted group need additional research. This is the reason why this procedure is regarded as being economical.
Learn more about experimental control here
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