Compute the sample mean and sample standard deviation for private and public colleges. Round your answers to two decimal places. S1 = S2 = b. What is the point estimate of the difference between the two population means? Round your answer to one decimal place. Interpret this value in terms of the annual cost of attending private and public colleges. $ c. Develop a 95% confidence interval of the difference between the annual cost of attending private and pubic colleges. 95% confidence interval, private colleges have a population mean annual cost $ to $ more expensive than public colleges. Check My Work Icon Key Previous Question 4 of 9 NextExercise 10.13