Three Friends, Who Are Also Very Competitive, Enrolled in Three

Essay

Three friends, who are also very competitive, enrolled in three different sections of the same history course. Their raw scores on the first test, along with the means and standard deviations of their respective sections, are listed below.
$\begin{array}{llll}&\underline{X} &\mu& \sigma \\\text { Marcus } & 81 & 79 & 3 \\\text { Klaus } & 98 & 85 & 6 \\\text { Ethan } & 64 & 75 & 5\end{array}$ a. Who gets bragging rights? Explain.
b. Who should devise a new study strategy? Explain.