[Video] Q18: Wa sample of 40 fourth-grade students was selected at random from a certain school. the 40 students completed a survey about the morning announcements, and 32 though the announcements were helpful. which of the following is the largest population to which the results of the survey can be applied?

Explanation for Question 18 From the Math (Calc) Section on the 2019 March Sat

Question 18 says w a sample of 45th, 2 fourth grade students was selected at random from a certain school. 3 The 40 students completed a survey about the morning announcements and 32 4 thought the announcements were helpful, which of the following is the largest population to 5 which the results of the survey can be applied. 6 So with these types of questions, it wants to know what can you generalize 7 the survey results to. So to find the answer, 8 all you have to do is find where were the people selected at 9 random, and that's always whatever sample that's from. 10 That's the largest group you can generalize to. 11 So here are the sample was selected at random from the school, 12 which means that this survey can be generalized to this school, 13 but not to any other schools or any larger sample size. 14 So any is incorrect because it can actually be generalized to a larger group 15 than that. And B is the correct answer all fourth grade students at the 16 school, because that's what the sample was see as incorrect. 17 It can't be all students at the school because only fourth graders were selected 18 for the survey and D is incorrect because only fourth 19 graders from this specific school were selected at random. 20 So it can't be generalized to a larger group than that. 21 So the answer here is B.