Answered: Three samples of each of three types of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Transcribed Image Text: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) PVC2 Temperature Hot (70° C) Warm (40º C) Cool (10° C) PVC1 252 276 277 321 319 219 301 Hot (70° C) Warm (40° C) Cool (10° C) 359 360 342 PVC3 PVC1 PVC2 302 281 Click here for the Excel Data File 278 345 321 342 378 357 352 Post hoc analysis for Factor 2: (d) Perform Tukey multiple comparison tests. (Input the mean values within the input boxes of the first row and input boxes of the first column. Round your t-values and critical values to 2 decimal places and other answers to 1 decimal place.) Post hoc analysis for Factor 1: PVC3 239 260 282 302 317 299 330 339 339 Answer is not complete. Tukey simultaneous comparison t-values (d.f. = 18) Hot (70° C) 271.9✔ 271.9✔ 318.6✔ 350.7✔ Critical values for experimentwise error rate: 0.05 0.01 Warm (40° C) 311.9 X Answer is not complete. Tukey simultaneous comparison t-values (d.f. = 18) PVC3 PVC1 318.6✔ 328.4 X Critical values for experimentwise error rate: 0.05 0.01 Cool (10° C) PVC2 350.7✔ 300.8 X

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