(See Steps) A random sample of 70 suspension helmets used by motorcycle riders and automobile race car drivers was subjected to an impact test. Damage was
Question: A random sample of 70 suspension helmets used by motorcycle riders and automobile race car drivers was subjected to an impact test. Damage was observed on 27 of these helmets.
- Find a 99% confidence interval for the true proportion of helmets that would show damage from this test.
- Suppose that the researchers want their 99% confidence interval to have an error no larger than 0.02. How many helmets must they test if the sample of 70 is used as a pilot study to estimate p?
Deliverable: Word Document 
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[Solution] The tensile strength of synthetic fiver used in manufacturing
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