Final answer:
To find Shanda's total score for both math tests, we need the exact score of the second test. If it is 20 points more, her total would be 170; if 20 points less, then 130. Percentiles reflect the relative performance among a group of students.
Step-by-step explanation:
The student's question involves calculating the total score for two math tests. Shanda scored 75 on her first math test, but the second score is incomplete. To find the total score for both tests, we would need to know the second score. If Shanda scored 20 points more on her second test, her second score would be 75 + 20 = 95.
Therefore, her total score would be 75 + 95 = 170. If Shanda scores 20 points less on her second test, her score would be 75 - 20 = 55, making her total score 75 + 55 = 130. However, without clarification, we cannot provide a definitive total score.
It's essential to understand how to interpret test scores and percentiles. As seen in solution 2.21, a 70th percentile indicates that 70 percent of students scored the same or a lower number of correct answers than what represents that percentile.
Similarly, scoring better than a certain percentage of students places an individual in a higher percentile, indicating a good performance relative to peers.