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Nine samples of PVC pipe of equal wall thickness are tested under three temperature conditions to...

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Basic Math

  1. Nine samples of PVC pipe of equal wall thickness are testedunder three temperature conditions to failure, yielding the resultsshown below. Research questions: Is mean burst strengthaffected by temperature level? Is there an “ideal” temperaturelevel? Explain. You will need to enter the data into Minitab.

Burst Strength of PVC Pipes (Pounds Per SquareInch)

                                          Temperature

Hot (70 Degrees C)

Warm (40 Degrees C)

Cool (10 Degrees C)

250

321

358

301

342

375

235

302

328

273

322

363

285

322

355

260

315

336

281

299

341

275

339

354

279

301

342

  • At the 0.05 level of significance, determine if there is adifference mean burst strength by temperature level. State yourhypotheses and show all 7 steps clearly. (14 points)
  • Give and interpret the p-value. (3 points)
  • Should Tukey pairwise comparisons be conducted? Why or why not?(3 points)
  • If appropriate, use Minitab to produce Tukey pairwisecomparison. Write a few sentences with your conclusions from thosecomparisons. (4 points)
  • Use Levene’s test to determine if the assumption of homogeneityof variances is valid. Give the hypotheses, test statistic,p-value, decision and conclusion. Use the 0.05 level ofsignificance. (8 points)
  • Verify with Minitab by attaching or including relevant output.(6 points)

Answer & Explanation Solved by verified expert
4.2 Ratings (649 Votes)
At the 005 level of significance determine if there is a difference mean burst strength by temperature level State your hypotheses and show all 7 steps clearly 14 points Ho 1 2 3 Ha at least one mean is different Analysis of Variance Source DF Adj    See Answer
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