The human resources (hr) department at an it service provider would like to use internal data on their sales employees to better screen applicants for sales positions. historically, the hr department has preferred to hire applicants with a college degree for this position. in internal data, current and past salespeople at the company with and without a college education are equally productive. suppose this measure of productivity is the only relevant performance metric and that there are a significant number of salespeople both with and without a college a degree represented in the internal data. do the data imply that the hr department should drop their preference for college-educated salespeople? why or why not?

Haley photocopying purchases a paper from an out-of-state vendor. average weekly demand for paper is 150 cartons per week for which haley pays $15 per carton. in bound shipments from the vendor average 1000 cartoons with an average lead time of 3 weeks. haley operates 52 weeks per year; it carries a 4-week supply of inventory as safety stock and no anticipation inventory. the vendor has recently announced that they will be building a faculty near haley photocopying that will reduce lead time to one week. further, they will be able to reduce shipments to 200 cartons. haley believes that they will be able to reduce safety stock to a 1-week supply. what impact will these changes make to haley’s average inventory level and its average aggregated inventory value?