A random sample of 900 13 to 17 years old found that 411 had responded better to a new drug therapy for autism. Let p be the proportion of all teens in this age range who respond better. a. What is the sample proportion? Have your answer to 4 decimals. b. To have the accuracy in the work, use the p hat you got in (a) to get the MOE, when the confidence level is 95%. Have your answer to 4 decimals. c. What is the 95% confidence interval for p? Have your answer to 4 decimals. Answer Format: (