$\begin{array}{ccccc}\hline \text { Month } &{\text { Weekly Sales }} \\\hline \text { June } & 1132 & 791 & 1006 & 990 \\\text { July } & 1060 & 1069 & 1007 & 1093 \\\text { August } & 1181 & 1143 & 1248 & 1223 \\\text { September } & 841 & 855 & 957 & 943 \\\hline\end{array}$

Perform a Tukey-Kramer test to determine which pairs of means, if any, differ. Use the $\alpha$ level of significance.

A) $\mu _ { \mathrm { Aug } } \neq \mu _ { \text {Sept } }$

B) $\mu _ { \text {June } } \neq \mu _ { \text {Aug } } \mu _ { \text {Aug } } \neq \mu _ { \text {Sept } }$

C) $\mu _ { \text {July } } \neq \mu _ { \text {Aug } }$

D) There is not enough evidence to conclude that any of the means differ.

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