Find the missing
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Can someone me do math because i am having a breakdown rn because i don’t get it

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

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41