Single nucleotide polymorphisms, frequently called SNPs (pronounced âsnipsâ), are the most common type of genetic variation among people. Each SNP represents a difference in a single DNA building block, called a nucleotide.
Below is a definition of random assignment: Random Assignment Definition Random assignment is a procedure in conducting experiments in which each participant has the same probability of being assigned to a particular condition of the experiment.
An example of an active independent variable that lacks random assignment is selection of course section by students. The investigators can set up the sections to be compared so it is an active intervention (perhaps to compare one text to another or to compare an online versus a face 2 face section).