Because random assignment guarantees that there aren't systematic disparities between both the individuals in each group, it improves the study's internal validity.
The Middle French word humain, which meaning "of or relating to man," is the source of the word "human," which first occurs in literature in the beginning of the 13th century. The origin of that word is the Latin term humanus, which is said to be a combination of the words "man" with "earth" (homo and humus).
Individuals are still evolving, despite the fact that many people are unaware of this process. The early hominin Australopithecus afarensis, who lived roughly 2.9 million years ago, does not resemble modern humans at all.
To know more about human visit:
https://brainly.com/question/11655619
#SPJ4
