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) DUCH DUGO DUCT
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) DUCH DUGO DUCT
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Ee 136.
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
302
281
278
345
321
342
Temperature
Hot (70º C)
Warm (40º C)
Cool (102 C)
PVC1
252
276
277
321
319
301
359
360
342
378
357
352
PVC3
239
260
282
302
317
299
330
339
339
Transcribed Image Text:(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:
Hot (70° C)
Warm (40° C)
Cool (10° C)
> Answer is not complete.
Tukey simultaneous comparison t-values (d.f. = 18)
Hot (70° C)
271.9
Warm (40° C)
318.6
PVC3
PVC1
PVC2
271.9
318.6
350.7
Critical values for experimentwise error rate:
0.05
0.01
Post hoc analysis for Factor 2:
Answer is not complete.
Tukey simultaneous comparison t-values (d.f. = 18)
PVC3
PVC1
311.9 X
328.4 X
Critical values for experimentwise error rate:
0.05
0.01
Cool (10° C)
350.7
PVC2
300.8 X
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