72. Specimens of three different types of rope wire were selected, and the fatigue limit (MPa)was determined for each specimen, resulting in the accompanying data.

Type 1 350 350 350 358 370 370 370 371 371 372 372 384 391 391 392 Type 2 350 354 359 363 365 368 369 371 373 374 376 380 383 388 392 Type 3 350 361 362 364 364 365 366 371 377 377 377 379 380 380 392

a. Construct a comparative boxplot, and comment on similarities and differences.

b. Construct a comparative dotplot (a dotplot for each sample with a common scale). Comment on similarities and differences.

c. Does the comparative boxplot of part

(a) give an informative assessment of similarities and differences?

Explain your reasoning.