Sample Size for a Mean (Descriptive)
Results shown here
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Formula
Sample Size for a Mean (Descriptive)
Where:
- n = required sample size
- Z = Z-score (e.g., 1.96 for 95% confidence)
- \sigma = expected standard deviation
- d = desired margin of error (precision)
Power Analysis Visualization
Legend Power Curve
Legend Selected (N=100, Tooltip Power 51.6%)