Find The Sample Size N Needed To Estimate The Percentage Of Adults. N During a period of 11 years 1265 of the people selected for grand jury duty were sampled and 37 of them were immigrants. In this video Professor Curtis uses StatCrunch to demonstrate how to find the sample size needed to estimate a confidence interval on a population mean MyS.
Signif level 1. The estimated minimum sample size n needed to estimate a population mean μ to within E units at 100 1 α confidence is n z α 2 2 σ 2 E 2 rounded u p To apply the formula we must have prior knowledge of the population in order to have an estimate of its standard deviation σ. Nov 16 2018 sample size n p1-pzE2 0151-01516450032 -p.
A Determine the minimum sample size required to construct a 95 confidence interval for the population mean.
Use a 006 margin of error use a confidence level of 90 and use results from a prior poll suggesting that 14 of adults have consulted fortune tellers. Signif level 1. N During a period of 11 years 1265 of the people selected for grand jury duty were sampled and 37 of them were immigrants. The answer is the correct sample size is eq683 eq.
