14.14 [EX14-07] Every year sixth-grade students in Ohio schools take proficiency tests. The list of sixth-grade reading score changes from the prior year are given in Exercise 14.7. Negative values indicate a decrease in score, positive values show an increase, and a zero shows no change from the prior year. Use the sign test to test the hypothesis that, “On average, reading scores have decreased from the prior year.” Use   0.05.