Quincy needs 322 yards of ribbon to decorate quilts for a craft fair. the ribbon comes in rolls of 15 yards.

part a
how many rolls of ribbon should quincy buy?

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