Answer to Question #340812 in Statistics and Probability for Lino

Question

An engineer who is studying the tensile strength of a steel alloy intended for use in

golf club shafts knows that tensile strength is approximately normally distributed

with σ = 60 psi. A random sample of 12 specimens has a mean tensile strength of x̅=

3250 psi. (a) Test the hypothesis that mean strength is 3500 psi. use α = 0.01. (b)

What is the smallest level of significance at which you would be willing to reject the

null hypothesis? [taken from Montgomery, p. 300]

Answer 1

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