('ritical Thinking Raul received a score of 80 on a history test for which the class mean was 70 with standard deviation 10. He received a score of 75 on a biology test for which the class mean was '70 with standard deviation 2.5. On which test did he do better relative to the rest of the class? 6. Basic Computation: z Score and Raw Score A normal distribution has u = 10 and o = 2. (a) Find the z score corresponding to x = 12. (b) Find the z score corresponding to x = 4. (c) Find the raw score corresponding to z = 1.5. (d) Find the raw score corresponding to z = -1.2