Ryan transfers15% of his monthly pay into a savings account. if max makes $1850 per month, how much will he save in ayear?

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