Meta Stack Exchange is where users like you discuss bugs, features, and support issues that affect the software powering all 155 Stack Exchange communities.

What is meta?
Here's how it works:
  1. Any Stack Exchange user can ask a question
  2. The community provides support, votes on ideas, and reports bugs
  3. Your voice helps shape the way Stack Exchange operates

On my Android.SE profile, top 2% this week is displayed in Reputation box: Reputation on Android.SE

But, when I click it, I found that my week rank is 1: Reputation League of Android.SE

So, how does this n% work?

share|improve this question
1  
Looks like its broken for Chance and Richard Borcsik as well if the accepted answer to this question is to be believed – Some Helpful Commenter Mar 22 '12 at 17:31
    
@ConradFrix Means, I can add bug tag.. – SS-3 Mar 22 '12 at 18:02
    
Its not broken. See my answer. I have removed bug tag.. – SS-3 Mar 23 '12 at 14:44

There were only 104 users with rep changes this week, so that works out (with rounding) to the top user being the top 2%, the text is correct.

share|improve this answer
    
It was really broken. Now, it has been corrected with top 0.96% this week. – SS-3 Mar 23 '12 at 12:15
    
From answer of this question, (1/104)*100 returns 0.96% after round off. Here, 1 is rank & 104 is no. of users having rep change.. – SS-3 Mar 23 '12 at 12:17
    
So, remove status-bydesign moderator tag from question, please. – SS-3 Mar 23 '12 at 12:52
    
FYI, when this question was first posted, the rep leagues showed 91 people with rep gain. I think top 2% was correct with regard to that number (it would put you right on the edge between top 2% and top 1% if I'm thinking about this correctly). I meant to post an answer at that time, but I forgot =) – jadarnel27 Mar 23 '12 at 13:13
    
@jadarnel27 still, its bug because exact value is 1.098% which rounds off to 1%, not 2%. – SS-3 Mar 23 '12 at 13:20
    
@SachinShekhar - that's not a bug, it rounds up intentionally, doing otherwise would be incorrect. – Nick Craver Mar 23 '12 at 14:01
    
@NickCraver Now, I get it (see my answer). But, you've confused me after calculating it with 104 users (with 104 users, it would be 0.96%)! – SS-3 Mar 23 '12 at 14:53
up vote -1 down vote accepted

Now, I get it. At this time situation is:
Reputation League at Android.SE

Calculating it is easy with this formula: (Rank/No. of Users with Rep Change)*100%
Rank=1; Users with Rep Change in week=104
So, (1/104)*100% = 0.96% (after round off)

At the time I asked question, users with rep change were 91. After applying this formula & rounding off after considering percentile rank, it was 2%. I am attaching @balpha's comment here (which explains more):

The top 2%, by definition, are the users whose rep change is above the 98th percentile. The top 1% are those above the 99th percentile. At 98.9, your rep change is below the 99th percentile, but above the 98th. Thus, you're in the top 2%, but not in the top 1%.

share|improve this answer
1  
Not a bug. At the time you posted this, you were 1/91 = 1.09%. 100-1.09 gives you 98.9, so you were still just within the top 2%. It only gets more specific than whole numbers once you get below 1%. – jadarnel27 Mar 23 '12 at 13:15
    
Nearest rounded no. is 1, not 2. – SS-3 Mar 23 '12 at 13:23
2  
@SachinShekhar - We're talking percentiles here, rounding down is incorrect...so we round up very intentionally (there's literally a line of code that does this). If on your SAT you rounded a 99.9% to 100% it would not be correct, you score better than 99% of people, yes, but you did not score better than 100%. – Nick Craver Mar 23 '12 at 14:01
    
@NickCraver Looks reasonable if its percentile. But, why is % symbol used? – SS-3 Mar 23 '12 at 14:35
4  
The top 2%, by definition, are the users whose rep change is above the 98th percentile. The top 1% are those above the 99th percentile. At 98.9, your rep change is below the 99th percentile, but above the 98th. Thus, you're in the top 2%, but not in the top 1%. – balpha Mar 23 '12 at 14:52
    
@balpha Thanks.. I have added you comment in answer. – SS-3 Mar 23 '12 at 15:02

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .