Given the Following Quiz Scores: 10, 9, 8, 7, 6

Question

Examlex · Accepted Answer

The Answer is

\begin{array}{rr}\underline{X} & \underline{X^{2}} \10 & 100 \9 & 81 \8 & 64 \{7}& {49} \\underline{6}&\underline{36}\40 & 336\end{array}

\begin{array}{l}\mu=\frac{40}{5}=8 \\sigma=\sqrt{\frac{330-\frac{(40)^{2}}{5}}{5}}=1.41\end{array}

a.

z=\frac{7-8}{1.41}=-.71

b.

z=\frac{10-8}{1.41}=+1.42

Essay