Final answer:
A 'Z' refers to a z-score in grading, which is a statistical measure of how a student's score relates to the class average. To predict a final exam score from a third exam score, you can use the equation 173.51 + 4.83(Third Exam Score). Grade inflation is the concept of higher grades being awarded for work that traditionally would have received lower grades.
Step-by-step explanation:
When your teacher adds a Z to your grade, it refers to a z-score, which measures how your score deviates from the mean of the class scores. For example, Susan's z-score of 2.0 indicates she scored two standard deviations above the class mean on her final exam.
If we want to predict the final exam score for a student based on their third exam score, we can use the given equation 173.51 + 4.83(Third Exam Score). Using this:
- For a student who scored 66 on the third exam, their final exam score would be 173.51 + 4.83(66) = 489.51.
- For a student who scored 90 on the third exam, their final exam score would be 173.51 + 4.83(90) = 607.71.
The term grade inflation refers to the increasing tendency for higher grades to be awarded for what used to be considered average or below-average work.