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
Statistics - Reiny, Friday, January 9, 2009 at 10:46pm
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?
Statistics - Peter, Friday, January 9, 2009 at 10:51pm
i have no idea
Statistics - PsyDAG, Saturday, January 10, 2009 at 10:19am
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.
Statistics - Anonymous, Thursday, July 18, 2013 at 2:57pm
c. is maria
Statistics - Anonymous, Friday, February 19, 2016 at 4:52pm
Statistics - name, Wednesday, March 30, 2016 at 10:18am