Question: Is the length of a steel bar affected by the

“Is the length of a steel bar affected by the heat treatment technique used?” This was the question being tested when the following data were collected.
a. Find the means and standard deviations for the two sets of data.
b. Find evidence about the sample data (both graphic and numeric) that support the assumption of normality for the two sampled populations.
c. Find the 95% confidence interval for m 1 = m 2.



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  • CreatedAugust 28, 2015
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