The following table presents the probability distribution of the number of vacations x
taken last year for a randomly chosen family. Find the probability that a family took less
than 3 vacations last year.
p(x)
15
.56
. 10
.04.

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