Halen wrote the product of 0.4 for the problem shown. don says that is not correct since when you multiply tenths by tenths the product will be in the hundredths. is don right? explain.

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