Hello there, as the principal data scientist at Appurify (a mobile testing and automation company) I'm happy to field questions on our findings here.
Krishna
Cool, kind of expected findings...if Apple is using ratings explicitly in rankings, I'd like to download only 5 star apps.
A bit impractical, given that all software will bug out sooner or later. And even worse, fickle people will instantly 1-star your app.
Appurify's mission is to help app developers make apps that will "not bug out sooner or later". That's our main point, debugging and testing tools for mobile are way behind where they need to be. When an app is really buggy/crashy the number of genuine 1-star reviews far outweighs fickle people.