akash_rawal OP , 1 month ago

The left axis is total number of ratings of each type (Garbage, Bronze, Silver, Gold, Platinum) in a given month (not per app). For example for month 2016-07 there were

<span style="color:#323232;">  "Garbage" => 22
</span><span style="color:#323232;">  "Bronze" => 14
</span><span style="color:#323232;">  "Silver" => 13
</span><span style="color:#323232;">  "Gold" => 55
</span><span style="color:#323232;">  "Platinum" => 61
</span>

On right side is the average rating. So if I assign values to each rating:

<span style="color:#323232;">  "Garbage" => 1
</span><span style="color:#323232;">  "Bronze" => 2
</span><span style="color:#323232;">  "Silver" => 3
</span><span style="color:#323232;">  "Gold" => 4
</span><span style="color:#323232;">  "Platinum" => 5
</span>

I can get an average rating, which will be between 1 to 5.

<span style="color:#323232;">((22*1) + (14*2) + (13*3) + (55*4) + (61*5)) / (22 + 14 + 13 + 55 + 61)
</span><span style="color:#323232;"> ~=  3.721
</span>