Statistics and Probability: More Practice

More practice on percent, probability and measures of central tendency, for once the required set is done.

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

What this covers

• probability and percent
• probability basics
• graph reading

The questions

1. Find the mean of: 4, 8, 6, 10, 12
2. A bag has 3 red and 7 blue candies. What is the probability (as a percent) of picking red?
3. Which type of graph is most useful for showing how a value changes over time?
4. A survey of 50 people found that 18 prefer coffee. What percent prefer coffee?
5. A die is rolled twice in a row. These two events are:
6. A bag holds 6 red and 4 blue marbles. One marble is drawn and kept out, then a second marble is drawn. What is the probability that both marbles are red? Give your answer as a percent, rounded to one decimal place.
7. A class of 25 students voted, and 40 percent chose the art elective. How many students chose art?
8. Find the median of: 3, 7, 9, 12, 20

Answer these free