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Warm up. What is the probability of choosing a red card from a standard deck of cards? What is the probability of choosing a king from a deck of cards? Given that a card is black, what is the probability that you choose a 4?. 50%. 8%. 2 /26 = 8%. Review HW. Probability Tables. - PowerPoint PPT Presentation
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Warm up
1. What is the probability of choosing a red card from
a standard deck of cards?
2. What is the probability of choosing a king from a
deck of cards?
3. Given that a card is black, what is the probability
that you choose a 4?
50%
8%
2/26 = 8%
Review HW
Probability Tables
A Little Vocabulary
AthleticsMusic/Arts SGA Other Total
Male Male total
Female Female total
Total Athletics total
Music/arts total
SGA total Other total
Table total
Joint Probability
individual celltable total
Marginal Probability
column or row totaltable total
Conditional Probability
individual cellspecified row or column
Example 1Using the table below, what is the joint probability of a female that is involved in SGA?
Athletics Music/Arts
SGA Other Total
Male 10 5 1 2 18
Female 5 6 0 1 12
Total 15 11 1 3 30
0/30 = 0%
Example 2Using the table below, what is the marginal probability of choosing someone who is involved with athletics?
Athletics Music/Arts
SGA Other Total
Male 10 5 1 2 18
Female 5 6 0 1 12
Total 15 11 1 3 30
15/30 = 50%
Example 3Using the table below, what is the conditional probability given that a person is male, that they are involved in Music/Arts?
Athletics Music/Arts
SGA Other Total
Male 10 5 1 2 18
Female 5 6 0 1 12
Total 15 11 1 3 30
5/18 = 28%
Task – Public Opinions
Homework
Back of Task/Handout
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