1. 13-2 Probability Distributions and Frequency Tables

2. Frequency Table: a data display that shows how often an item appears in a category Relative Frequency: the ratio of the frequency of the category to the total frequency

3. Problem 1: Finding Relative Frequencies
The results of a survey of students’ music preferences are organized in the frequency table. What is the relative frequency of preference for rock music?
Type of Music Preferred
Frequency
Rock 10
Hip Hop 7
Country 8
Classical 5
Alternative 6
Other 4

4. Type of Music Preferred
What is the relative frequency of preference for
Classical?
Country?
Type of Music Preferred
Frequency
Rock 10
Hip Hop 7
Country 8
Classical 5
Alternative 6
Other 4

5. Problem 2: Calculating Probability by using Relative Frequencies
A student conducts a probability experiment by tossing 3 coins one after another. Using the results shown, what is the probability that exactly two heads will occur in the next three tosses?

6. A student conducts a probability experiment by spinning the spinner shown. Using the results in the frequency table, what is the probability of the spinner pointing at 4 on the next spin?

7. Probability Distribution: shows the probability of each possible outcome Can be shown using a frequency table

8. Problem 3: Finding Probability Distribution