Which of the following is most likely a parameter as opposed to a statistic? O a. The average score of the first five students completing an assignment O b. The proportion of trucks stopped yesterday that were cited for bad brakes O c. The average height of people randomly selected from a database O d. The proportion of females registered to vote in a countyThe classification of student class designation (freshman, sophomore, junior, senior) is an example of O a. a continuous random variable O b. a categorical random variable. O c. a discrete random variable O d. a parameterIf the outcomes of a random variable follow a Poisson distribution, then their a. mean equals the standard deviation b. mean equals the variance c. median equals the variance d. median equals the standard deviation