A recipe that makes 2.5 dozen muffins requires 1.25 cups of flour mandy wants to make 10 dozen muffins. How many cups of flour will she need?

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