[See Steps] Of 200 fluorescent tubes tested in a laboratory, [79 lasted beyond 250 hours. Find a point estimate for the true proportion of fluorescent tubes
Question: Of 200 fluorescent tubes tested in a laboratory, [79 lasted beyond 250 hours.
- Find a point estimate for the true proportion of fluorescent tubes that will last beyond 250 hours.
- Form a 95% confidence interval to predict p. Interpret results.
- How large a sample size would be needed to predict p to within 2 percentage points assuming that no prior p is known? Assume 99 % accuracy is desired.
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