An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores?

Letd=(verbalSATscorespriortotakingtheprepcourse)(verbalSATscoresaftertakingtheprepcourse)). Use a significance level of=0.05 for the test. Assume that the verbal SAT scores are normally distributed for the population of students both before and after taking the SAT prep course.

Student1234567

Score on first SAT540490520360430530400

Score on second SAT580590570420460570460

Determine the decision rule for rejecting the null hypothesis

H0. Round the numerical portion of your answer to three decimal places.

(Example: Reject Ho if ? )