13. Every month a clothing store conducts an inventory and calculates losses from theft. The store would like to reduce

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13 Every Month A Clothing Store Conducts An Inventory And Calculates Losses From Theft The Store Would Like To Reduce 1 (83.03 KiB) Viewed 50 times

13. Every month a clothing store conducts an inventory and calculates losses from theft. The store would like to reduce these losses and is considering two methods. The first is to hire a security guard, and the second is to install cameras. To help decide which method to choose, the manager hired a security guard for 6 months. During the next 6-month period, the store installed cameras. The monthly losses were recorded and are listed here. The manager decided that because the cameras were cheaper than the guard, he would install the cameras unless there was enough evidence to infer that the guard was better. What should the manager do? Security guard Cameras 355 486 284 303 401 270 398 386 477 411 254 435 a) Determine whether these data are sufficient to infer at the 5% significance level that the two population variances differ (Perform classical Hypothesis testing). b) Do these results allow us to infer at the 5% significance level that there is a difference between Security guard and Cameras (Perform classical Hypothesis testing)? What should the manager do?