A researcher claims that the lifetimes (in hours)of fluorescent light bulbs are the same regardless of
manufacturer. Random samples are selected from 3 different manufacturers. The data are listed below. Test the
claim that the samples come from identical populations by using (a)a one-way ANOVA test and
(b)a Kruskal-Wallis test. Compare the results. Use $$\alpha$$ = 0.05. $$\begin{array} { c | c | c }
\text { Manufacturer 1 } & \text { Manufacturer 2 } & \text { Manufacturer 3 } \
\hline 190220 & 180170 & 200210 \
235215 & 200175 & 195205 \
225230 & 175180 & 200205 \
215220 & 190185 & 205205
\end{array}$$

Question

A researcher claims that the lifetimes (in hours)of fluorescent light bulbs are the same regardless of
manufacturer. Random samples are selected from 3 different manufacturers. The data are listed below. Test the
claim that the samples come from identical populations by using (a)a one-way ANOVA test and
(b)a Kruskal-Wallis test. Compare the results. Use $$\alpha$$ = 0.05. $$\begin{array} { c | c | c } 
\text { Manufacturer 1 } & \text { Manufacturer 2 } & \text { Manufacturer 3 } \
\hline 190220 & 180170 & 200210 \
235215 & 200175 & 195205 \
225230 & 175180 & 200205 \
215220 & 190185 & 205205
\end{array}$$

Quizplus · Accepted Answer

The Answer of A researcher claims that the lifetimes (in hours)of fluorescent light bulbs are the same regardless of
manufacturer. Random samples are selected from 3 different manufacturers. The data are listed below. Test the
claim that the samples come from identical populations by using (a)a one-way ANOVA test and
(b)a Kruskal-Wallis test. Compare the results. Use $$\alpha$$ = 0.05. $$\begin{array} { c | c | c } 
\text { Manufacturer 1 } & \text { Manufacturer 2 } & \text { Manufacturer 3 } \
\hline 190220 & 180170 & 200210 \
235215 & 200175 & 195205 \
225230 & 175180 & 200205 \
215220 & 190185 & 205205
\end{array}$$

A Researcher Claims That the Lifetimes (In Hours)of Fluorescent Light α\alphaα

A Researcher Claims That the Lifetimes (In Hours)of Fluorescent Light $\alpha$