Education Technology

# Statistics and Probability / Unequally Likely Outcomes

Grade Level 7
Activity 14 of 24
In this lesson, students investigate chance processes and generate probability models for events that are not equally likely.

## Planning and Resources

Objectives
Students should recognize a chance event in which the outcomes are not equally likely and find the probabilities of those outcomes.

Vocabulary
equally likely
probability

Standard:

## Lesson Snapshot

#### Understanding

Students recognize the difference between outcomes of a chance event that are equally likely and those that are not.

### What to look for

By the end of this lesson, students should be able to use their experimental results and the theoretical probabilities to explain why the events in a chance process are or are not equally likely.

### Sample Assessment

Are the outcomes in the spinner equally likely? Why or why not?

Answer:
No, because the probability of getting each color is not the same: the probability of getting a red is (3/6), blue is (2/6) and green is (1/6).

#### The Big Idea

Not all outcomes of a chance event are equally likely.

### What are the students doing?

Students experience setting up a model, using a simulation to collect data and estimate probabilities for a real situation in which the outcomes are not equally likely.

### What is the teacher doing?

You may need to refer to Activity 13 in this series to refresh students on determining the probability of a compound event.