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Observed statistic and p-value

You now have a null distribution. In order to get a p-value and weigh up the evidence against the null hypothesis, you need to calculate the difference in proportions that is observed in the late_shipments sample.

late_shipments is available; dplyr, infer, and ggplot2 are loaded.

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Copy, paste, and modify the null distribution pipeline to get the observed statistic.

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