Conditional probabilities

Practicing Statistics Interview Questions in Python

Conor Dewey

Data Scientist, Squarespace

Course overview

  1. Probability and sampling distributions
  2. Exploratory data analysis
  3. Statistical experiments
  4. Regression and classification
Practicing Statistics Interview Questions in Python

Quick review

 

Venn diagram of conditional probabilities

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Practicing Statistics Interview Questions in Python

Bayes' theorem

  Bayes' theorem decomposed

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Practicing Statistics Interview Questions in Python

Probability tree diagrams

  Decision tree for sides of a coin

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Practicing Statistics Interview Questions in Python

Example: passing the interview

  Example problem for an interview

Practicing Statistics Interview Questions in Python

Example: passing the interview

both = 0.25 * 0.40
print(both)

coding = (0.25 * 0.40) + (0.75 * 0.20)
print(coding)

0.1
0.25

stats_given_coding = both / coding
print(stats_given_coding)

0.4
Practicing Statistics Interview Questions in Python

Summary

  • Conditional probabilities
  • Bayes' theorem
  • Probability tree diagrams
Practicing Statistics Interview Questions in Python

Let's prepare for the interview!

Practicing Statistics Interview Questions in Python

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