Confidence Interval for Proportion Calculator
Enter the number of trials (the sample size), the number of successes, and the confidence level.
WARNING: The number of trials and the number of successes should be positive integers. The
number of successes should not be more than the number of trials. Confidence percentages
should be between 1 and 100, and usually more than 75.
Navidi and Monk, Elementary Statistics, 2nd edition, McGraw Hill Education, 2016, and Mario F. Triola, Elementary Statistics Using The TI-83/84 Calculator, 3rd edition, Addison-Wesley 2011 were used as references in the creation of this applet.