Problem 1  Problem Background:  An experiment to test content was run on one of our games. The experiment had three variants each with  a different content set. The aim of the experiment was to determine the variant with the optimum  balance of economy, engagement and retention.   Find attached the relevant data from the experiment which can be used to figure this out.     

Question(s) to be answered:  1. Which variant is our winner and why?  2. Rank the variants in the order of their difficulty    

 Terms Used in Data:  Experiment Name ='content'  Experiment Version = '2'  variant_group =variant (1, 2, 3)  Cli=client (Android - 0)     DAU: Daily Active Users in the Game  users: Players performing a specific activity. Subset of DAU     

Economy Terms:  Spend refers to the player using coins to buy hints  Purchase (Buy) refers to the player buying coins (IAP)  Earn refers to the player earning coins due to his progress in the game.     

Engagement Actions:  view: viewing a puzzle  clear: solving a puzzle  fail:  failing on a puzzle  use_hint: spending coins to reveal hints on a puzzle.     

Retention:   dn: Percentage of people playing on Date=D+n out of people who installed on Date=D     Most of the other terms used are self-explanatory. Please mention any assumptions that you make  clearly. All the data attached is for this problem only.        

Problem 2  Background:  Our gaming studio is looking to fast follow one of the following two games:  1. Words with Friends  2. Candy Crush     Question(s) to be answered:  Which one according to you is a better investment and why?     You are free to research and use any publicly available metrics for both of these games and make any  other reasonable assumptions. Please do mention the values used and assumptions made very clearly.    Here is some retention data which we feel might help you analyze the same. 

Data Link