Questions 1 - 4 Your manager is asked to consider which of two project management tools to buy for use throughout the company where you are employed. In a trial she has selected 12 project managers who have familiarised themselves with each package. They time how long it takes for them to prepare a project network using each package with the following results (in hours), where i denotes the sample mean and s denotes the sample standard deviation Pr. Manager Package A Package B 1 2 3 4 5 8.6 8.8 8.7 9.2 9.4 8.5 9.0 8.5 8.8 9.2 6 7 8 9 10 11 12 1 S 10.3 11.8 12.4 9.5 9.3 9.1 8.8 9.66 1.23 10.5 10.8 11.5 9.2 9.4 8.8 8.6 9.40 0.99 As a junior member of the staff, you are asked to analyse the results. Q1. Your manager wants to know whether package B is quicker to use than package A. Let MA and us be the average time using package A and B respectively. Formulate the null hypothesis H, and the alternative hypothesis H, for a two-sample comparison test. A. H:MAH. MA SMB . :: ; , :