Score Percent of students D The score distribution shown in the table is for all students who took a yearly AP statistics exam. An AP statistics teacher had 63 students preparing to take the AP exam. Though they were obviously not a random sample, however, the teacher considers the students to be "typical" of all the national students. 5 13.6 4 21.7 3 25.6 What is implied by the use of the word "typical"? Assume the probability values shown in the table do not come from a sample of 63 students but rather they represent the actual probabilities for this particular situation. Those probabilities are parameters. 2 18.3 1 20.8 Answer the questions based on this assumption. ECô) (enter as a decimal, not a percentage) SD spp) = | (Round SD (O) to five decimal places as needed.) PCô2 0.2678 )= (Round probability to three decimal places as needed.) b) Suppose that instructor has another set of 63 students. What's the probability that 42.46% or more of his students score at least a 4 on the AP statistics exam, from a sample of 63 students? = (Round SD Elf) (enter as a decimal, not a percentage) socê) = 0 to five decimal places as needed.) PCô2 0.4246 )= 0 (Round probabilty to three decimal places as needed.) >