Example of Bootstrapping for 1-Sample Proportion

An editor of a video game web site wants to determine the proportion of readers that own a PlayStation console. The editor uses a bootstrap for the proportion to examine the sampling distribution of the proportion and to estimate a confidence interval for the proportion of readers that own a PlayStation console.

  1. Open the bootstrapping for 1-sample proportion dialog box.
    • Mac: Statistics > Resampling > Bootstrapping for 1-Sample Proportion
    • PC: STATISTICS > Resampling > Bootstrapping > 1-Sample Proportion
  2. From the drop down, select Summarized data.
  3. In Number of events, enter 124.
  4. In Number of trials, enter 200.
  5. On the Options tab, enter 1 in Base for random number generator.

    Using Base for random number generator ensures that your results match the example.

  6. Click OK.

Interpret the results

The 95% CI indicates that the editor can be 95% confident that the population proportion of readers that own a PlayStation is between approximately 0.56 and 0.69. The histogram shows that the bootstrap distribution appears to be normal, so the editor can trust the results.

Observed Sample
Bootstrap Samples for Proportion
Number of Resamples
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