Last year the sales at a bookstore were 75% fiction books, and 25% nonfiction books.

the average cost of a fiction book was $15. the average cost of a nonfiction book was $16.

what was the average cost of all fiction and non-fiction books sold at the bookstore last year?

enter your answer as a decimal in the box.

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?