Impossible or Improbable — A Gentle Introduction to Probability

• What is probability?
• The differences between the Frequentist approach and the Bayesian approach
• How to visualize probability
• How to utilize the rules of probability
• Using confusion matrices to look at the basic metrics

The law of large numbers

1. Pick a random number between 1 and 10 and find the average.
2. Pick two random numbers between 1 and 10 and find their average.
3. Pick three random numbers between 1 and 10 and find their average.
4. Pick 10,000 random numbers between 1 and 10 and find their average.
5. Graph the results.

Compound events

• The probability that A and B occur is P(A ∩ B) = P(A and B)
• The probability that either A or B occurs is P(A B) = P(A or B)
• Pink: This refers to the people who have cancer and had a negative test
outcome
• Purple (A intersect B): These people have cancer and had a positive test
outcome
• Blue: This refers to the people with no cancer and a positive test outcome
• White: This refers to the people with no cancer and a negative test outcome

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Data Science Enthusiast, Remote Worker, Course Trainer, Archery Coach, Psychology and Philosophy Student

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Desi Ratna Ningsih

Data Science Enthusiast, Remote Worker, Course Trainer, Archery Coach, Psychology and Philosophy Student