A follicle is the root of the hair strand. A hair sample is cut from the scalp of the hair. A sample can include a follicle if the sample is pulled from the scalp and not cut.
It calculates the difference between each set of pairs, and analyzes that list of differences. The P value answers this question: If the median difference in the ... If your samples are small and...
This is a very vague area for new students in Statistics, especially for non-math students.
Random Sample: Each member of the entire population has an equal chance of being selected.
Simple...