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Where is the highest accident rate?

It's time to answer the executive's first question: did the accident rate increase from 2016 to 2017? Now that you have the had_accident variable, you can calculate the accident rate by taking the mean of had_accident. Use the appropriate statistical test to see if the accident rate increase is significant. Then, determine which site has the highest accident rate.

This exercise is part of the course

HR Analytics: Exploring Employee Data in R

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Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Find accident rate by year
hr_joined %>%
  ___

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