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

question 58

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

---

Definitions:

Cutting

The act of dividing or severing something with a sharp instrument.

Consent Form

A document that individuals sign to give formal permission for a specific procedure or participation, acknowledging they have been informed of the risks, benefits, and alternatives.

Surgery Arrival

The moment a patient arrives at a surgical facility for a scheduled operation, marking the beginning of pre-surgical procedures and documentation.

Probes

Instruments or tools used to explore, investigate, or measure something within the body or in scientific research.