Jenevieampaloviz Jenevieampaloviz Math Answered 2. A sample of 60 grade 9 students ages was obtained to estimate the mean age of allgrade 9 students of Diplahan. X = 15.3, o2 = 16, with 95% confidence14.29<<UL=16.01UL=17.01UL=60.01UL=10.61