Tensile strength tests were carried out on two different grades of wire rod, resulting in the...

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Tensile strength tests were carried out on two different grades of wire rod, resulting in the accompanying data. Sample Mean

math Statistics-And-Probability

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Answer 1

Answer #1

The statistic software output for this problem is:

Two sample Z summary confidence interval: Mean of population 1 (Std. dev. = 1.2) /2 Mean of population 2 (Std. dev. = 2) 1-2

The 95% CI is :

(-20.91 , -20.09)

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Answer 2

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