A study was conducted at a local college to analyze the average cumulative GPA's of a simple random sample of 99 students who graduated last year. Fill in the letter of the phrase that best describes each of the items below. Variable Parameter ev Population v Sample Data f v Statistic a. Numerical b. Cumulative GPA's collected from students who graduated from the local college last year c. The average cumulative GPA from all students who graduated from the local college last year d. The set of cumulative GPA from 99 students who graduated from the local college last year e. The set of all cumulative GPA's from all students who graduated from the local college last year f. The average cumulative GPA from 99 students who graduated from the local college last year