Assistant principal at Honey Island Elementary School has just learned of new method of teaching arithmetic to fifth graders. In order to see whether the new method is better than the traditional method, she selects 30 students at random and assigns them to Mrs. Hubert, who she knows is a good arithmetic teacher. Based on the student's standardized test scores, the assistant principal matches the students in terms of intellectual ability, forming 15 pairs. Mrs. Hubert teaches arithmetic by the traditional method to one member of each pair and uses the new method with the other 15 students. Both groups receive equal amount of instruction. Which member of each pair receives which method of instruction is determined at random. At the end of the year, the students take the California Achievement Test. Their math scores are given in the table below.

Which statistical test would be used for this scenario?

1. A university lab director has computers set up in two locations on campus. One of these locations, the Old Library is a dark old building; the other one is the new brightly lighted, well-decorated Arts and Sciences building. The lab director has noted that the equipment layout is about the same in each building and both labs receive the same amount of use. Each term approximately 50 students (as shown below) use these labs for an "Introduction to Computers" course, with about half in each lab. The professor who teaches the classes has noticed that the two groups of students are about the same in that they both have the same demographic characteristics. In order to find out which group of students does better, the professor decides to collect final examination scores from all 50 students and compare the results of the students in the Library to those in the Arts and Sciences. Students in the Students in the Arts and Sciences building Old Library 70 73 73 76 76 65 69 69 72 72 72 79 79 79 71 75 75 75 75 79 78 78 78 78 82 82 86 82 82 77 85 85 88 81 81 81 82 84 85 85 81 91 84 84 87 88 90 88 88 84 State the research question. State the hull and alternative hypotheses. . Analyze data Interpret the result. Complete the test using a = .05