Sendy Logistics Challenge
$7,000 USD
Predict the estimated time of arrival (ETA) for motorbike deliveries in Nairobi
23 August–25 November 2019 23:59
974 data scientists enrolled, 357 on the leaderboard
rating for riders
published 5 Oct 2019, 18:48

In the website of sendy (https://support.sendyit.com/article/143-rating-your-delivery) the rating vary from 1 star to 5 stars, so how the average rating was calculated to have an interval of 0-15.2 ?

Some data has been masked, including the average rating.