Exercise

Performing a goodness of fit test

The bar plot of vendor_inco_term suggested that its distribution across the four categories was quite close to the hypothesized distribution. You'll need to perform a chi-square goodness of fit test to see whether the differences are statistically significant.

To decide which hypothesis to choose, we'll set a significance level of 0.1.

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

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Using the late_shipments dataset, perform a chi-square goodness of fit test on vendor_inco_term. The hypothesized proportions are given in hypothesized_props.