What do we use as a point estimate for the population proportions? Why is this a good point estimate? In your own words, what is the margin of error? Why is it so important for constructing a confidence interval? Suppose that I use Art of Stat to construct a confidence interval for the percentage of students who passed with a C or better in the Statistics class and find a lower limit of 68.9% and an upper limit of 76.3%. State the conclusion for the confidence interval in context if a 95% confidence is used. What happens to the confidence interval as we increase the sample size? Explain your reasoning (explanations without reasoning will not be given credit.) What does the critical value z* represent in the formula and how does it relate to the level of confidence