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What are vectors?
Vector operations
Indexing and filtering
33. Exercise 6


Perfect. You're almost done! Just one more exercise.


The Versico management decided to reward the employees who have worked the hardest to improve their running performance over the last six months. Using the race_time vector, calculate the mean of all improved times for employees that improved their running times regarding their first running time (first_running_time vector).

Stuck? Here's a hint!

If an employee improved their time, the difference between first_running_time and race_time for such an employee would be a positive number.

You'll need to use the following condition:

race_time[first_running_time - race_time > 0]