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what is the formula to calculate sample size. 196 for 95 confidence level P population proportion expressed as decimal assumed to be 05 50 M Margin of Error at 5 005. If the population is N then the corrected sample size should be 186N N185.
Formulas To Calculate Sample Standard Deviation Http Ncalculators Com Statistics Mean Standard Deviation Standard Deviation Online Calculator Learning Math from www.pinterest.com
Here is an example of how the math works assuming you chose a 90 confidence level 6 standard deviation and a margin of error confidence interval of - 4. N z 2 p 1 - p e 2 where z 1645 for a confidence level a of 90 p proportion expressed as a decimal e margin of error. How the sample size calculator works The calculator helps you determine the number of people you need to survey your sample size calculation based the level of accuracy you want to achieve.
The formula does not cover finite population.
Learn more about population standard deviation or explore other statistical calculators as well as hundreds of other calculators addressing math finance health fitness and more. Accuracy is determined by the following three variables. If the population is N then the corrected sample size should be 186N N185. In the case of small-scale running events with N By adding the required minimum sample size for each category of running events 2323 2 351 2 363 2074 a grand total sample size of.
