SAT Math: Statistics and Probability (Drill 2)

About This Drill

SAT Math: Statistics and Probability (Drill 2) is a Math practice drill covering Statistics and Probability. It contains 5 original questions created by Brian Stewart, a Barron's test prep author with over 20 years of tutoring experience.

SAT statistics and probability questions test weighted mean calculations, understanding how outliers affect measures of center and spread, computing probabilities of independent events, interpreting margin of error in survey results, and finding median from grouped data.

Questions in This Drill

1. Class A has 20 students with a mean score of 82. Class B has 30 students with a mean score of 90. What is the combined mean for all 50 students?
2. The data set {10, 20, 30, 40, 50} has a mean of 30. If 90 is added, what is the new mean?
3. P(rain Saturday) = 0.4 and P(rain Sunday) = 0.3. If independent, what is P(rain both days)?
4. A poll of 500 voters found 62% support a policy, margin of error ±4%. Which is a plausible value for true support?
5. What is the median of {3, 7, 12, 18, 25, 30}?