Megans best test score for Chemistry has a z-score of 0.5 as compared to all stu
ID: 3138763 • Letter: M
Question
Megans best test score for Chemistry has a z-score of 0.5 as compared to all students in his class. Which statement best interprets his z-score?
A: Megans test score is 0.5 points lower than all students taking the same test.
B: Megans test score is 0.5 points higher than all students taking the same test.
C: Megans test score is 0.5 standard deviations below the mean for all students taking the same test.
D: Megans test score is 0.5 standard deviations above the mean for all students taking the same test.
Explanation / Answer
A z-score is the number of standard deviations from the mean a data point is. Since it is positive here. So the correct answer is D. Megans test score is 0.5 standard deviations above the mean for all students taking the same test.