When determining the sample size for a proportion,if you have no previous information available to estimate π,then the best value to use is π = 0.5.

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When no prior information is available about the proportion (π), the standard approach is to assume the worst-case scenario, which is a proportion of 0.5 (meaning that the event is equally likely to occur or not). This is known as the "conservative estimate" and ensures that the sample size is large enough to capture the true proportion with a certain level of confidence.

When Determining the Sample Size for a Proportion,if You Have