Three Randomly Chosen Pieces of Four Types of PVC Pipe

Multiple Choice

Three randomly chosen pieces of four types of PVC pipe of equal wall thickness are tested to determine the burst strength (in pounds per square inch) under three temperature conditions, yielding the results shown below. $$\begin{array} { | c | c | c | c |c | } \hline{ \text { Temperature } } & \text { PVC1 } & \text { PVC2 } & \text { PVC3 } & \text { PVC4 } \\\hline& 250 & 301 & 235 & 217 \\\text { Hot } \left( 70 ^ { \circ } \mathrm { C } \right) & 273 & 285 & 260 & 255 \\& 281 & 275 & 279 & 241 \\ \hline& 321 & 342 & 302 & 240 \\ { \text { Warm } \left( 40 ^ { \circ } \mathrm { C } \right) } & 322 & 322 & 315 & 260 \\& 299 & 339 & 301 & 278 \\\hline & 358 & 375 & 328 & 301 \\\text { Cold } \left( 10 ^ { \circ } \mathrm { C } \right) & 363 & 355 & 336 & 333 \\& 341 & 354 & 342 & 302 \\\hline\end{array}$$ Which test would be appropriate?

A) One-factor ANOVA
B) Two-factor ANOVA with replication
C) Dependent (paired-samples) t-test
D) Two-factor ANOVA with no replication