StatsApps

Confidence Interval for a Proportion

A confidence interval gives a range of estimates for an unknown parameter.

Resources

  1. Visualization of confidence intervals for proportions:

    Confidence Intervals for a Proportion

    This applet allows users to drag sliders to change the population proportion, confidence level and sample size. The applet helps users visualize the meaning of the phrase "C% confidence," by showing that C% of the samples result in confidence intervals that contain the true parameter value.

    Author: Statistical Applets.
  2. Intuiting confidence intervals for a proportion:

    Simulating Confidence Intervals for a Proportion

    Similarly to the previous resource, this applet also simulates many confidence intervals for a proportion. The applet includes detailed instructions and an associated activity.

    Author: © 2019 Pearson Education Inc. All rights reserved.