Every time a candidate completes a Codility Library task, we add more insights to that task to help you understand and set expectations around your candidate's performance.
Task statistics indicate a task's difficulty based on previous candidates' scores. The graph shows how many candidates, who have attempted to solve this task, succeeded in achieving a certain score.
In this task, the statistics show us that the majority of candidates score 90% or higher.
HOW TO USE THIS:
Depending on the role and experience level of the test you're creating, you may want to reference a task's statistics to understand the scoring pattern (if it's a u-shape / binary, or a bell curve) and therefore whether it will give you a yes/no signal vs. a good/great signal.
If you have any additional questions about task statistics or would like to leave your feedback, please contact us at firstname.lastname@example.org.