In those mails not replied to, mails WITH someone in Cc and mails WITHOUT anyone in Cc are in ratio of ~2/11. Am I missing something, or does this have no stat

In those mails not replied to, mails WITH someone in Cc and mails WITHOUT anyone in Cc are in ratio of ~2/11. Am I missing something, or does this have no statistical relationship to the number of replies received? Mails replied to could have all had a CC, or none had a CC and the CC ration for unreplied mails still be the same, no?