Calculate and interpret mean, median, and other measures of center and spread for a single data set.
33 original one-variable data questions in the SAT Ranker bank, with instant scoring and an Elo-based rank once you sign up. Below are a few free samples with full explanations.
What is the median of the data set {4, 7, 9, 12, 15}?
With five values already in order, the median is the middle (third) value: 9.
The average of five numbers is 8. If four of the numbers are 2, 2, 15, 19, what is the fifth number?
Sum of five numbers = 8 × 5 = 40. Sum of the four known numbers = 2 + 2 + 15 + 19 = 38. Fifth number = 40 − 38 = 2.
The average of five numbers is 12. If four of the numbers are 17, 7, 18, 11, what is the fifth number?
Sum of five numbers = 12 × 5 = 60. Sum of the four known numbers = 17 + 7 + 18 + 11 = 53. Fifth number = 60 − 53 = 7.
The average of five numbers is 12. If four of the numbers are 16, 7, 6, 14, what is the fifth number?
Sum of five numbers = 12 × 5 = 60. Sum of the four known numbers = 16 + 7 + 6 + 14 = 43. Fifth number = 60 − 43 = 17.
The average of five numbers is 12. If four of the numbers are 19, 4, 20, 3, what is the fifth number?
Sum of five numbers = 12 × 5 = 60. Sum of the four known numbers = 19 + 4 + 20 + 3 = 46. Fifth number = 60 − 46 = 14.