On a recent biology quiz, the class mean was 20 with a standard deviation of 2.6. Calculate the z-score (to 4 decimal places) for a person who received score of 23. 

z-score for Biology Quiz:

The same person also took a midterm in their marketing course and received a score of 83. The class mean was 80 with a standard deviation of 4.3. Calculate the z-score (to 4 decimal places). 

z-score for Marketing Midterm:

Which test did the person perform better on compared to the rest of the class? Select an answer Biology Quiz Marketing Midterm

Find the coefficient of variation for the Biology Quiz. Give answer as a percent to 3 decimal places.

C-Var for Biology Quiz: %

Find the coefficient of variation for the Marketing Midterm. Give answer as a percent to 3 decimal places.

C-Var for Marketing Midterm: %

Which test scores were more variable? Select an answer Biology Quiz Marketing Midterm