A researcher claims that at least 10% of all football helmets have manufacturing flaws
Chapter 9, Problem 9-91(choose chapter or problem)
A researcher claims that at least 10% of all football helmets have manufacturing flaws that could potentially cause injury to the wearer. A sample of 200 helmets revealed that 16 helmets contained such defects. 0.05 H1 H0: p 0.03 : p 0.03 0.05 H1 H0: p 0.9 : p 0.9 (a) Does this finding support the researchers claim? Use 0.01. Find the P-value. (b) Explain how the question in part (a) could be answered with a confidence interval.
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