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 six months. During the next 6-month period, the store installed cameras. The monthly losses were recorded and are listed below.
The manager decided that because the cameras were cheaper than the guard, he would install the cameras unless there was enought evidence to infer that the guard was better. What should the manager do? Use a 10% significance level.
In the cell that you used to make your decision, bold the font and format the number as a percentage with two digits after the decimal point.
Guard 355 284 401 398 477 254
Cameras 486 303 270 386 411 435