Question 1
A population proportion is to be estimated from the sample described. Approximate the margin of error for the 95% confidence interval. Round your answer to four decimal places, if necessary.
A researcher wishes to estimate the proportion of left-handed people among a certain population. In a random sample of 1000 people from the population, 68.3% are left-handed. Find the margin of error for the 95% confidence interval.
◦ 0.0009
◦ 0.0147
◦ 0.0208
◦ 0.0294
Question 2
A population proportion is to be estimated from the sample described. Approximate the 95% confidence interval. Round your answer to four decimal places, if necessary.
Sample size = 225, sample proportion = 0.9
◦ 0.8973 < p < 0.9027
◦ 0.8333 < p < 0.9667
◦ 0.8600 < p < 0.9400
◦ 0.8717 < p < 0.9283
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