Flammability tests were conducted on children's sleepwear The Vertical Semirestrained Test was used, in which pieces of fabric were burned under controlled conditions. After the burning stopped, the length of the charred portion was measured and recorded. The same fabric samples were tested at five different laboratories. The data from the Minitab, and the analysis of variance results from Minitab are above. Using a 0.05 significance level, test the claim that the five laboratories produce the same mean test scores.
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The null hypothesis tested is:
H0: There is no significant difference in the mean test score of five laboratories
H1: The mean test score of five ...
The solution gives step by step procedure for testing Flammability in 5 labs. Null Hypothesis, Alternative Hypothesis, Significance Level, Critical Value and P value are given with interpretations.