It's so hard to really compare numbers for battery usage since a lot of things can and do factor in--primarily the type of usage, the length of usage, the type of connection used, the strength of that connection, etc., etc., etc.
With the use of airplane mode and WiFi when possible you can make a phone have half a day of usage (12+ hours) and half a month of standby (15+ days) before it dies...but does that really say anything if you then post that screenshot (while you are not in airplane mode anymore)?
Barring some fairly obvious things--like something not working correctly, or constantly running in the background, or having a poor signal/connection--there are quite a few variables in play in most cases to say anything beyond some sort of a generic average that some will still normally be above and others below (thus the "average" part of it).