Car dealer Aakar Singh pays 89% for a car that has a base price of $23,998. He pays 87% of it’s $3,425 options price and a $460 destination change. What is the dealer’s cost?

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