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.
    Note

    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
N
Proportion
Bootstrap Samples for Proportion
Number of Resamples
Average
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