Question

her last score was 80 on a test and that put her in the 75th precentile. the teacher curved the test and added 5 point to everyones test. what is her new precentile a) 70th b) 75th c) 80th d) 85th e) not enough information

Explanation:

Step1: Understand percentile concept

Percentile represents the position of a data - point relative to other data - points in a distribution.

Step2: Analyze the effect of adding a constant

When a constant value (in this case, 5 points) is added to every data - point in a distribution, the relative position of each data - point with respect to others does not change.
If a student was in the 75th percentile before adding 5 points to each score, after adding 5 points to each score, the student's relative position among all the scores remains the same.

Answer:

B. 75th