I am posting four screenshots so it all makes more sense.

Three samples of each of three types of PVC pipe of equal wall thickness are tested to failure under three temperature conditions, yielding the results shown below. Research questions: Is mean burst strength affected by temperature and/or by pipe type? Is there a \"best" brand of PVC pipe? Burst Strength of PVC Pipes (psi) TEMperature PVCl PVCZ PVC3 Hot (709 C) 250 300 234 273 285 259 283 278 281 Warm (409 C) 325 339 298 323 323 319 303 337 302 Cool (109 C) 361 371 325 360 355 339 342 358 345 Click here for the Excel Data File (a-1) Choose the correct row-effect hypotheses. a. H0: A1 at A2 as A3 a: 0