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What Is Variance in Statistics? Definition, Formula, and Example

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A Measure of 2 x 2 Association with Stable Variance and Approximately Normal Small-Sample Distribution: Planning Cost-Effective Studies

This is a preview. Log in through your library . Abstract A measure of 2 x 2 association, Z, is developed having the property that n(Z - Z) has approximately a standard normal distribution, even for ...
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Power and Sample Size Calculation Incorporating Misspecifications of the Variance Function in Comparative Clinical Trials with Over-Dispersed Count Data

Over-dispersed count data are frequently observed in clinical trials where the primary endpoint is occurrence of clinical events. Sample sizes of comparative clinical trials with these data are ...