A researcher wanted to estimate the true proportion of smokers in a certain city (p). He selected a random sample of size n = 50 people and found 15 smokers in the sample. a) Find a point estimate for (p). b) Find a 95% confidence interval for (p). c) If we use the sample proportion (p?) to estimate (p), calculate the margin of error using the confidence level 0.95.
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3 or 30%. b) Show more…
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