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Calculate Sample Size Using Confidence Interval

Calculate Sample Size Using Confidence Interval. Then we can find the sample size to yield . This statistics video tutorial explains how to calculate the sample size given the confidence level and margin of error.

How To Find The Margin Of Error For A 95 Confidence Interval Quora
How To Find The Margin Of Error For A 95 Confidence Interval Quora from qph.cf2.quoracdn.net
It deals with how confident you want to be that the actual mean falls within your . ((1.96)2 (0.5) (0.5)) / (0.05)2 = 385. The margin of error portion of a confidence interval formula can also be used to estimate the sample size that needed.

What sample size should you use for a survey in a city with a population of 120,000 people?

((1.96)2 (0.5) (0.5)) / (0.05)2 = 385. You want to have a confidence level of 95%. So a random sample of 385 households in our target population should be enough to give us the confidence levels we need. For example, if you used a 95 percent confidence level, meaning that you can say .


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