Sample Size Calculator Proportion Confidence Interval

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Sample Size Calculator Proportion Confidence Interval. However, the relationship is not linear, e.g., doubling the sample size does not halve the confidence interval. One sample and two sample confidence interval calculator with cis for difference of proportions and difference of means.

Confidence Interval Of Finite Population For N 50 P 0 15 N 750 97 Confidence from getcalc.com

Find out if you have enough people to take your survey. Given that 120 people work at company q, 85 of which drink coffee daily, find the 99% confidence interval of the true proportion of people who drink coffee at company q on a daily basis. Confidence interval for a proportion this calculator uses javascript functions based on code developed by john c.

If you are dealing with a population mean instead of a population proportion, you should use our minimum required sample size calculator for population mean.

Depending on which standard deviation is known, the equation used to calculate the confidence interval differs. If you want to find instead a confidence interval for the mean, please use this confidence interval calculator. One sample and two sample confidence interval calculator with cis for difference of proportions and difference of means. Enter the value of the sample mean, standard deviation, total sample size, and confidence level.