Statistics and Probability

Alberta strand: Statistics and Probability. Covers mean, median, and experimental probability.

15 questions, free, marked as you go with a worked explanation on every one.

What this covers

The questions

  1. Find the mean of: 4, 8, 6, 10, 7.
  2. Find the median of: 3, 9, 5, 1, 7.
  3. A bag has 3 red marbles and 7 blue marbles. What is the probability of picking a red marble?
  4. Find the mean of: 12, 18, 15, 9, 21
  5. Find the mode of: 6, 8, 8, 3, 8, 5
  6. A jar has 5 green and 15 red candies. What is the probability of picking green, in lowest terms?
  7. Find the range of: 22, 8, 15, 30, 11
  8. Five students wrote a quiz. Four of them scored 82, 76, 91 and 68. The mean score for all five students was exactly 80. What did the fifth student score?
  9. Find the mean of: 4, 8, 6, 10, 12.
  10. Find the mode of: 2, 3, 3, 5, 7, 3, 8.
  11. Find the range of: 15, 42, 8, 23, 37.
  12. Four numbers have a mean of 10. Three of them are 8, 11 and 9. What is the fourth number?
  13. A spinner has 10 equal sections, and 4 of them are yellow. What is the probability of landing on yellow, as a percent?
  14. A bag has 12 marbles in total, and 5 of them are blue. What is the probability of NOT drawing a blue marble, as a fraction in simplest form? Give the numerator.
  15. A fair coin is flipped once. What is the probability of landing on tails, as a decimal?

Answer these free