That means \(2x_0, 2y_0\) is a point on \(y = P(x)\).īy the way, don't get confused by the notation \(y = P(x)\). What does this mean? When we plug in \(2x_0\) into \(P(x)\), we get \(2y_0\). D - Don't be confused by the notation.So, Lisa has to cover the head start distance as well as the distance Sam runs up until the point she catches up to him: Sam covers a distance of \(5t\), but his head start gave him \(15\times 5 = 75\) meters on Lisa. In that time, Lisa covers a distance of \(8t\). B - Let \(t\) be the time it takes for Lisa to catch up to Sam.Because the standard deviation is lower for Juan's math class, the heights of the students in that class are less variable (less spread out). It says nothing about how the mean or the median compares with that of another data set. D - The standard deviation is a measure of how spread out the data is.Top 3 Toughest Questions according to Official Difficulty Levels If \((x_0, y_0)\) is a point on the graph of \(y = Q(x)\), which of the following is a point on the graph of \(y = P(x)\)?įor more challenging questions, I highly recommend my SAT Math book. In the equation shown above, \(Q\) and \(P\) are functions. January 1st, 2016 (Only 37% were Correct) Based on these findings, which of the following is an appropriate conclusion?Ī) Most of the snack-sized bags of potato chips produced by the company in January each had a weight of at least 0.95 ounces, while most of the snack-sized bags of potato chips produced by the company in February each had a weight of at least 0.98 ounces.ī) The mean weight of all the snack-sized bags of potato chips produced by the company in January must have been 0.03 ounces more than the mean weight of all the snack-sized bags of potato chips produced by the company in February.Ĭ) The mean weight of all the snack-sized bags of potato chips produced by the company in January was 0.03 ounces less than the mean weight of all the snack-sized bags of potato chips produced by the company in February.ĭ) The number of snack-sized bags of potato chips in the January sample was less than the number of snack-sized bags of potato chips in the February sample.ĥ. The February sample had a mean weight of 0.98 ounces and a margin of error of 0.04 ounces. The January sample had a mean weight of 0.95 ounces and a margin of error of 0.06 ounces. A manager at the company randomly selects a sample of snack-sized bags of potato chips to be weighed in a routine quality-assurance check each month. November 2nd, 2015 (Only 35% were Correct)Ī potato chip company produces the same number of snack-sized bags of potato chips every month. Enjoy! Top 3 Toughest Questions according to Official Difficulty LevelsĪs of now, there are only 3 questions The College Board has designated as hard.Ģ. In any case, it's worthwhile to look at all the tough questions, whether it's by student response rate or by the official difficulty level, so I'm presenting them all in this post. Because the exam was new when The College Board wrote some of these questions, they didn't have an accurate idea of their actual difficulty. What The College Board considers difficult is different from what most students would consider difficult.The top students only bother with the most difficult questions.This discrepancy could be due to several factors: On the other hand, quite a few medium questions had correct response rates as low as 32%!! Similarly, the November 24th 2015 and January 15th 2016 questions, both labeled difficult by The College Board, had correct response rates of 59%. Some of the questions that were designated as hard (difficulty level 3) had correct response rates that were actually quite high.įor example, the November 14th 2015 question (supposedly difficult) had a correct response rate of 63%, which is higher than the average for all questions. On the whole, the correct response rate was about 62%, which means on average, each question was answered correctly 62% of the time.Īfter going through all the math questions in the archive, I noticed something peculiar. It also tells you the official difficulty level. I highly recommend it.Īs you can see, the app tells you the percentage of responses that were correct for each question. It's quite helpful and serves as great practice. I've been taking a closer look at the math questions of the day available on The College Board SAT app recently. You just won't be able to track down questions according to their date. However, the app just cycles through the same questions, so everything in this post will still be relevant to you. The dates referred to in this post will be different if you have a newer version of the app.
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