Tim measures a water tower (cylinder) with the circumference of 62.8cm and height of 11.5cm, in his town a person needs 300cm3 of water in summer; how many people can this water tower support (sorry i worded this confusing my)

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