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Calculate required sample size for statistical significance. Determine power analysis, effect size requirements, and confidence intervals for scientific expe...
Approximate the chance of meeting someone who resembles you based on crowd size and the diversity of appearance traits.
Calculate Cohen's d effect size from two independent sample means and standard deviations.
Calculate the probability that at least two people in a group share the same birthday. Explore the famous birthday paradox phenomenon with interactive calculations.
Calculate damages for Negligent Infliction of Emotional Distress (NIED) claims. Estimate settlement values using zone of danger, bystander rule, and physical...
Estimate the probability of axion–photon oscillations in a magnetic field using the Primakoff effect.