question #9 normal distribution

Chapter 6: Normal Distribution (concepts) Progress saved Score: 0/10 0/10 answered Question 9 Ethan and Diego began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Ethan took a test in Social Studies and earned a 81.9, and Diego took a test in Math and earned a 67.4. Use the fact that all the students' test grades in the Social Studies class had a mean of 70.5 and a standard deviation of 9.1, and all the students' test grades in Math had a mean of 61.9 and a standard deviation of 10 to answer the following questions. a) Calculate the z-score for Ethan's test grade. 2 [Round your answer to two decimal places.] b) Calculate the z-score for Diego's test grade. 2 [Round your answer to two decimal places.] c) Which person did relatively better? Ethan Diego They did equally well. Question Help: M Message instructor Submit