Answer:
Step-by-step explanation:
Since your population are the students in math class, you can use the z-score formula
in order to comparing the two math test scores. Where
is the mean for the class,
is the standars deviation and x is Mary score.
For the first test
, so ,
.
For the second test
, so ,![z_{1} = (.66-.53)/(.14)=.93](https://tex.z-dn.net/?f=z_%7B1%7D%20%3D%20%28.66-.53%29%2F%28.14%29%3D.93)
Mary do better in the second test, relative to the rest of the class (because
, it means the second score is nearer to the mean score of the class than the first one )