Help please! I will give for the correct answer! A researcher is interested in the effects of sun exposure on mood in men and women. She splits her subjects up by gender, then randomly assigns them to high and low-exposure conditions (resulting in four total conditions: high-exposure men, high-exposure women, low-exposure men, and low-exposure women). This is an example of a:

One-group-pretest-protest

Mixed factorial design

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −