KJ wants to earn $400 from the interest on his investments. If he invests $3000 in a fund with 4% annual interest, how long will KJ have to wait (in
years) for the interest to be worth $400?

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