yue bing is a new internn at linkedin. she has designed a new recommendation algorithm for connecting linkedin users to other users and wants to see if it will cause an increase the average number of messages sent by linkedin users. she will randomly sample one group of users from the linkedin network and set up their accounts so that they use the new recommendation algorithm. she will then randomly sample another group of users. who will operate on the regular recommendation algorithm. she provides you with some of her date, though it is incomplete