Do data support conclusion that mean tensile strength


The supervisor of a hardware manufacturer is conducting a test of the tensile strengths of steel coils. He obtained the following data: Coil 1: = 118, s - 17, n -9, and Coil 2: = 143, s = 24, n = 16. The tensile strength for the two types of steel coils are approximately normally distributed. Based on the p value, do the data support the conclusion that the mean tensile strengths of the two coils are different at a significance level of 7%? Do not assume that the population variances are equal.

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Basic Statistics: Do data support conclusion that mean tensile strength
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