Measures of the Spread of the Data · Exercise 19

Three students were applying to the same graduate school. They came from schools with different grading systems. Which student had the best GPA when compared to other students at his school? Explain how you determined your answer.

$$\begin{array}{cccc}\text{Student}& \text{GPA}& \text{School Average GPA}& \text{School Standard Deviation}\\ \text{Thuy}& \text{2.7}& \text{3.2}& \text{.8}\\ \text{Vichet}& \text{87}& \text{75}& \text{20}\\ \text{Kamala}& \text{8.6}& \text{8}& \text{.4}\end{array}$$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Statistics · §2.7 Measures of the Spread of the Data · Exercise 19