On a certain day, the national average for the cost ofa gallon of gasoline is $2.74. An official

at a gasoline company selects an SRS of 25 gas stations and finds an average cost of $2.71

per gallon. Which of the following statements is true?

(a) $2.74 is a statistic and $2.71 is a parameter.

(b) $2.74 is a parameter and $2.71 is a statistic.

(c) $2.74 and $2.71 are both parameters.

(d) $2.74 and $2.71 are both statistics.