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Sample Size Calculator for 2 Proportion Test

Hint: Use this calculator to determine the number of samples required to compare two population proportions
  • The minimum acceptable probability of preventing type I error
  • The minimum acceptable probability of preventing type II error
  • Enter the first population proportion. For 50%, just enter 50
  • Enter the second population proportion. For 45%, just enter 45
  • Minimum samples required to check if the two proportions are similar or not