The grade point averages for 10 randomly selected junior college students are listed below. Assume the grade point averages are normally distributed. Find a 98% confidence interval for the true mean. Round to the nearest hundredth.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
◦ (2.12, 3.14)
◦ (3.11, 4.35)
◦ (1.55, 3.53)
◦ (0.67, 1.81)