An educational consulting firm is trying to decide whether high school students who have never used a handheld calculator can solve a certain type of problem more easily with a calculator that uses reverse polish logic or one that does not use this logic. a sample of 25 students is selected and allowed to practice on both calculators. then each student is asked to work one problem on the reverse polish calculator and a similar problem on the other. let p = p(s), where s indicates that a student worked the problem more quickly using reverse polish logic than without, and let x = number of s