Estimate Minimum Sample Size. Since larger trials take more time and resources than smaller trials you probably want to determine the minimum sample size necessary to achieve an acceptable level of statistical power. Working out sample size from confidence intervals.
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Those formulas then provide specific guidance on what you have to know or estimate for a given situation to estimate the required sample size. Find The Minimum Sample Size Needed To Estimate The Percentage Of Managers Who Have A Cat. Decide on a reasonable estimate of key proportions p to be measured in the study 3.
This will produce a conservative sample size estimate.
The minimum sample would be 100. Decide on the degree of accuracy d that is desired in the study. Selecting the effect size. 1-5 or 001 and 005 4.
