Define: voluntary responsea) every possible sample of a given size has the same chance to be selected. b) using extraneous factors to create similar groups. c) the explanatory variable(s) in an experiment. d) successively smaller groups are selected within the population in stages. e) people who choose themselves for a sample by responding to a general appeal. f) choosing the individuals easiest to reach. g) population is divided into similar groups and a srs is chosen from each group. h) gives each member of the population a known chance to be selected. i) directly holding extraneous factors constant.

You make and sell triangular flags. each flag has a base of  3.53.5  feet and a height of  2.52.5  feet. fabric for the flags costs  $0.40$0.40  per square foot. what is the cost to make one flag?

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

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?