Its about confidence intervals. Here is the questions :

1- A survey of 350 randomly selected Irish households shows that only 62% have a broadband connection. Infer a 95% confidence interval for the proportion of all Irish households that have broadband connection.

2- A survey of mortgage holders at the current time shows that 14% are in arrears with their mortgage repayments. Out of the 300 people surveyed, 48% report that they are currently able to manage, while some in the sample also report that although they are not in arrears, they fear for the future. Infer a 99% confidence interval for the proportion of all mortgage holders who are currently in arrears with their mortgage repayments.