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An impact test study is conducted on suspension helmets used by motorcycle riders and automobile racecar drivers, with an estimated 30% failure rate. Which distribution
An impact test study is conducted on suspension helmets used by motorcycle riders and automobile racecar drivers, with an estimated 30% failure rate. Which distribution best describes the outcome variable? How large must the sample size be if we wish to construct a
95% confidence interval on the helmets' failure rate such that the error does not exceed 15%?
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