Data from an Izod impact test was described in Exercise
Chapter 9, Problem 86E(choose chapter or problem)
Data from an Izod impact test was described in Exercise 8-30. The sample standard deviation was 0.25 and n = 20 specimens were tested.
(a) Test the hypothesis that \(\sigma = 0.10\) against an alternative specifying that \(\sigma \neq 0.10\), using \(\alpha = 0.01\), and draw a conclusion. State any necessary assumptions about the underlying distribution of the data.
(b) What is the P-value for this test?
(c) Could the question in part (a) have been answered by constructing a 99% two-sided confidence interval for \(\sigma^2\)?
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