In determining the sample size needed to estimate the population proportion p, we let the sample proportion 
= 1 if we have no knowledge of even the approximate values of 
.
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Q1: The sample proportion Q2: An unbiased estimator has an average value Q4: The sample mean Q4: The sample variance s2 is an Q6: An unbiased estimator is a sample statistic Q7: An interval estimate is a range Q9: The sample variance is a point estimate Q14: The sample variance (where you divide by Q17: Knowing that an estimator is unbiased only Q27: The confidence interval estimate of the population
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