The management of a school wants to find out the absenteeism rate of the students in all of its 10 branches. They selected a random sample of 100 children and found that on an average there was an absenteeism rate of 7% in a semester. Construct a 95% confidence interval estimate for the population proportion of the students who are absent from the school in this semester. What will be the results if the sample size changes to 500? What does this confidence interval depict?