Question 12 Joni and Salome began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Joni took a test in Art History and earned a 76.4, and Salome took a test in Science and earned a 64.5. Use the fact that all the students' test grades in the Art History class had a mean of 72.5 and a standard deviation of 10.6, and all the students' test grades in Science had a mean of 65 and a standard deviation of 9.8 to answer the following questions. a) Calculate the z-score for Joni's test grade. Z [Round your answer to two decimal places.] b) Calculate the z-score for Salome's test grade. Z [Round your answer to two decimal places.] c) Which person did relatively better? O Joni O Salome They did equally well