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What is a contingency table used for?
AIt ranks outcomes from most to least likely
BIt converts frequencies into a tree of branches
CIt shows two variables and eases probabilities
DIt lists every outcome of a chance experiment
Answer & Solution
Correct answer: C. It shows two variables and eases probabilities
1. A contingency table displays sample values against two different variables at once.
2. Its row and column totals make joint and marginal probabilities easy to read off.
3. Conditional probabilities follow at once by dividing a cell by its own row or column total rather than by the grand total.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 3 "Probability Topics", section 3.4 Contingency Tables and Probability Trees_
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