posted by Peter on .
Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both classes follow a normal distribution.
A. Convert Maria's midterm score of 84 to a standard z score.
which is correct?
B Convert Zoe's midterm score of 89 to a standard z score.
C. Who did better relative to her class?
c. They performed the same.
e. Cannot determine
I had maria's z-score as (84-79)/5 = 1.2
and Zoe's as 0.5
what does that mean?
Whose score is closest to the class average?
i have no idea
Since the Z score measures deviation from the mean, the smallest Z score is closest to the mean.
I hope this helps a little more. Thanks for asking.
c. is maria