Explanation for Question 23 From the Math (Calc) Section on the Official Sat Practice Test 9
Question 23 asks us near the end of a U S cable news show. 2 The host invited viewers to respond to a poll on the show's website that 3 asked, do you support the new federal policy discussed during the show at 4 the end of the show, the host reported that 28% responded yes. 5 And 70% responded. No, which of the following best explains why the results 6 are unlikely to represent the sentiments of the population of the United States? 7 So essentially this question is grounded in statistics. 8 It's asking us why this results from the show, 9 there is ultimate survey are not representative of the entire population of 10 the U S and the correct answer to this one is B those 11 who responded to the poll were not a random sample of the population of 12 the United States. The reason that this is correct is because you 13 have to take a random sample of a group of people for it, 14 three representative of that population. 15 So if they'd randomly sampled the entire United States, 16 then maybe some conclusions about that poll could be applied to the whole population. 17 But this only shows, this only shows a pattern amongst 18 the viewers of the show, which is not a random sample. 19 It invited viewers of the show, but I'll also talk through a C and 20 D and explain why those are not correct. A size to the percentages, 21 do not add up to 100%. So any possible conclusions from the poll are 22 invalid. This is not true. 23 Um, essentially you don't have to have the percentages out of i...