The accompanying summary data on compression strength (lb) for 12 × 10 × 8 in. boxes appeared in the article "Compression of Single-Wall Corrugated Shipping Containers Using Fixed and Floating Test Platens" (J. Testing and Evaluation, 1992: 318-320). The authors stated that "the difference between the compression strength using fixed and floating platen method was found to be small compared to normal variation in compression strength between identical boxes." Do you agree? Is your analysis predicated on any assumptions?

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Sample Size Sample Mean Sample SD Method Fixed Floating 10 10 807 757 27 41