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Can someone me i’m confused. will give brainliest and a whole bunch of points

Can someone me and plz do the problem

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