Statistics and Probability

Alberta strand: Statistics and Probability. Covers independent and dependent events.

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

What this covers

• probability basics
• probability and overlapping groups
• averages

The questions

1. A spinner has 5 equal sections numbered 1-5. What is the probability (as a percent) of landing on 3?
2. Drawing a card from a deck, NOT replacing it, then drawing again. These events are:
3. Two fair coins are flipped. What is the probability (as a percent) both land on heads?
4. A class of 30 students has 12 who play soccer. What is the probability (as a percent) that a randomly chosen student plays soccer?
5. What is the median of the set {3, 7, 1, 9, 5}?
6. Find the mean of the data set {10, 20, 15, 25}.
7. Which measure of central tendency is most affected by extreme values (outliers)?
8. A survey of 250 students found that 40% play a sport and 24% play an instrument, while 10% do both. How many of the students surveyed do neither?

Answer these free