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

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10