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Mathematics, 14.02.2020 05:28 brookesquibbs
The diameters of aluminum alloy rods produced on an extrusion machine are known to have a standard deviation of 0.0001 in. A random sample of 25 rods has an average diameter of 0.5046 in.
a) Test the hypothesis that mean rod diameter is 0.5025 in. Assume two-sided alternative and significance level of 0.05.
b) Find the p-value for test in part (a).
c) Construct a 95% two-sided confidence interval on the mean rod diameter.
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