Curriculum placement
Algebra 1. This describes the skill, not a learner estimate.
Association in a two-way table
Interpret joint marginal and conditional relative frequencies in two-way tables
Problem types
- Joint, marginal and conditional percents
- Read conditional percents
- Find a conditional or joint percent from a two-way frequency table
Builds on
- Two-way tables
- Reading a categorical graph · Earlier idea
Counting each category in a picture graph extends to relative frequencies, which compare the share of each category within a group.
Leads to
- Finding a conditional probability · Extend the idea
A conditional relative frequency in a table is a conditional probability.
- Reading a statistical report critically · See it applied
Reports that state percents from a table are checked by comparing the right conditional frequencies.
Related skills
- Association is not causation · Related idea
A strong association in a two-way table does not show that one variable causes the other.
- Independence and mutual exclusion · Related idea
Independent events have no association: the probability of one does not change given the other, as a two-way table with no association shows.
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