In the survey of 1500 students for the united states age 18 andunder, 1043 were concerned about how they would pay forcollege.
a) Find the mean and standard deviation of those concerned aboutfinancing college.
b) Construct a 90% confidence interval for the populationproportions. Interpret your results.
c) Find the minimum sample size needed to estimate thepopulation proportion at the 99% confidence level in order toensure that the estimate is accurate within 4% of the populationproportion.
