CHAPTER 5 4) The braking time of a car Determine whether the following is a probability distribution. If not, identify the requirement that is not satisfied 5) X P(x) 0 | 0.187 1 0.137 0.145 0.181 4 0.235 5 0.203 6) In a certain town, 20% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults (among 4 randomly selected adults) who have a college degree X P(x) D D.4096 1 0.4096 2 0.1536 3 0.0256 4 0.0016 Find the mean of the given probability distribution. 7) In a certain town, 60% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults (among 4 randomly selected adults) who have a college degree. P(x) 0 | 0.0256 1 0.1536 2 0.3456 3 0.3456 0.1296