here are more and the answers to some of them might be on other questions that I posted on this subject

Ineed to know how to write question one in mathematical terms

What is 10+10+20 about the origin the square root of a triangle.

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required