Oil producers are interested in finding high-strength nickel alloys that are corrosion-resistant. Nickel alloys are especially susceptible to hydrogen embrittlement, a process that results when the alloy is cathodically charged in a sulfuric acid solution. To rate the performance of two incoloy alloys, 800 and 902, hydrogen charged tensile of each alloy were measured for the amount of ductility loss (recorded as a percentage reduction of area). The measurements for eight tensile specimens of each type are given in the table. Conduct a test to determine whether the probability distributions of ductility losses differ for the two nickel alloys. Use α = .05.

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NICKEL2 Alloy 800 Alloy 902 59.2 66.3 67.2 61.3 78.8 69.8 46.8 58.7 79.2 66.2 50.2 40.9 75.0 70.7 44.5 55.4