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how to figure out sample size statistics. You can use the formula to calculate a sample size for a confidence level of 99 and margin of error -1 01 using the standard deviation suggestion of05. So you need to take a random sample of at least 211 college students in order to have a margin of error in the number of stored songs of no more than 20.
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For instance if you specify the smallest effect size that is practically significant variability and power the software calculates the required sample size. So you need to take a random sample of at least 211 college students in order to have a margin of error in the number of stored songs of no more than 20. One of the most difficult steps in calculating sample size estimates is determining the smallest scientifically meaningful effect size.
Can be solved for n yielding n 4 W2 1 B2 where B is the error bound on the estimate ie the estimate is usually given as within B.
Determine your margin of error. Use the sample size formula. Using the sample size formula you calculate the sample size you need is which you round up to 211 students you always round up when calculating n. N is population size.
