Zach's italian pizza bar bates 2000 pizzas in the first year that are open. in the second year they baked 3,000 pizzas and in the third year 4,000 pizzes

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics