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

question 47

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. $$\begin{array} { r | r | r } \text { Brand A } & \text { Brand B } & \text { Brand C } \\\hline 190 & 182 & 203 \\220 & 170 & 210 \\230 & 203 & 199 \\215 & 175 & 200 \\224 & 178 & 196 \\231 & 181 & 197\end{array}$$

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Definitions:

Phagocytes

Cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.

Venous Circulation

Venous circulation refers to the system of veins and venules that return deoxygenated blood from the body back to the heart.

Cisterna Chyli

A dilated sac at the lower end of the thoracic duct into which lymph from the intestinal trunk and two lumbar lymphatic trunks flow.

Subclavian Veins

The subclavian veins are major veins located under the collarbone that transport blood from the arms and the upper thorax back to the heart.