2. A researcher claims that the nutrition of a child has an effect on his/her attention span. To test the claim at 95% confidence interval, 15 randomly selected students were sampled from three different meal plans: no breakfast, light breakfast, and full breakfast. Their attention span (in minutes) was recorded during the morning math class and are shown below: No breakfast Light breakfast Full breakfast 12 15 20 11 15 18 CO 14 17 CO 12 17 11 15