According to a pilot study of 20 people conducted at a major university, daily doses of a compound called arabinogalactan over a period of 8 months resulted in a significant increase in the beneficial lactobacillus
species of bacteria, Why can't it be concluded that the compound is beneficial for the majority of people?
It is not known if lactobacillus is beneficial to everybody,
Ob
Only 20 people were used in the study,
The study did not last long enough
The people studied were not selected randomly,

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Which of the following best describes the delian problem?