Beyunka has six baseballs that she keeps at her grandparents’ house. That number represents 20% of the baseballs that come in a case. The relationship is shown in the tape diagram below. What is the total number of baseballs that come in a case? *

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