A survey of an urban university (population of 25,450) showed that 750 of 1100 students sampled attended a home football game during the season. What inferences can be made about student attendance at football games? a) Construct a 98% confidence interval for the true proportion of the students who attended a home football game? (4 marks) b) What sample size would be needed to obtain an error of plus or minus 2% with a 99% confidence? (3 marks)