12T 1. A student claims that listening to loud music helps her study. To defend her argument, she gathers the following results for four recent tests and her study habits. Test History Volume of Music (Dial Setting) Test Mark (%) 0 English 1 Math Science 2 1.5 48 59 72 70 a. Does a linear regression analysis support the student's claim? b. Suggest two ways that the student could improve the validity of her study.