Question
Susan is taking an art history class and a biology class. She received a 31 on her first art history exam (Class Mean = 27;
Susan is taking an art history class and a biology class. She received a 31 on her first art history exam (Class Mean = 27; SD = 2) and a 59 on her first biology exam (Class Mean = 55; SD= 3). Susan is eager to compare her relative performance in each class.
- How can z-scores help Susan compare her grades in these two classes?
- Compute z-scores for both exams. In which class is Susan doing better? [Please show your calculations]
- Susan's friend Brian from art history class says that he scored exactly 3 standard deviations above the mean on their first exam. Did Brian do better or worse than Susan on this exam?
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Mathematical Statistics With Applications In R
Authors: Chris P. Tsokos, K.M. Ramachandran
2nd Edition
124171133, 978-0124171138
