I don't understand how to graph it on the curve. I used invnorm to get lower interval for middle 96% (.4386) and upper interval for the middle 96% (.5114). I used 380 as the mean even though no mean was actually given.

2. You are conducting a study for a university to estimate the population proportion of all their students with a GPA of 3.0 or higher. From a random sample of 800 of their students they found 380 with a GPA of 3.0 or higher (so the sample proportion = 380/800 = 0.475). The standard error is 0.0177 a) Construct a 96% confidence interval for the population proportion of all their students with a GPA of 3.0 or higher. State your answer in words (and "in context") Show your work! b) Based on your confidence interval, does it appear that the majority (i.e. more than 50%) of these students have a GPA of 3.0 or higher? Explain your reasoning