a) A university report on the key methods of transport was collected in 2021. Of the 400 students who participated in this report, 208 students stated that they took the tram to university as their main form of transportation. Determine the sample proportion of students who took the tram.

b) Since we cannot be 100% confident about how close the population proportion, is to the sample proportion, p, we create an interval estimate which is thought to include with a certain percentage of confidence

Construct a 90% confidence interval for the population proportion of students who take the tram to university.

c) Provide a practical interpretation of the interval you have constructed in b) in the context of this question.