The Table Below Shows the Lifetimes (In Hours) of Random

Essay

The table below shows the lifetimes (in hours) of random samples of light bulbs of three different brands. Use a
0.01 significance level to test the claim that the different brands have the same median lifetime. $$\begin{array} { r | r | r } \text { Brand A } & \text { Brand B } & \text { Brand C } \\\hline 190 & 182 & 203 \\220 & 170 & 210 \\230 & 203 & 199 \\215 & 175 & 200 \\224 & 178 & 196 \\231 & 181 & 197\end{array}$$