Out of 400 students sampled, 300 of them said that they hoped to have children someday. with 95% confidence, what is the approximate percentage of the students in the population who hope to have children someday? a. 68.5% to 81.5% b. 70.7% to 79.3% c. 72.8% to 77.2% d. 66.3% to 83.7%