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Fundamental Guessing Theories
Percentiles

Percentiles

Before start you probably need to know: explanations of percentiles are quite confusing and different from each teacher teaches and…
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Solomon Xie
Intro to Probability

Intro to Probability

It’s easy but always confusing if you haven’t yet totally understood it in the first place.
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Population Parameters

Population Parameters

Population
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Permutations & Combinations

Aside from probability, Permutations and Combinations are essential tools for statistics.
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Solomon Xie
Benford's Law

Benford's Law

It’s also called Newcomb-Benford's Law, Law of Anomalous Numbers, and First-Digit Law.
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Set Basics

Set Basics

Refer to wiki: Set Refer to Khan academy: Basic set operations
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Clusters, Outliers, Gaps, Peaks

Clusters, Outliers, Gaps, Peaks

Khan lecture: Shape for distributions. Khan lecture 2 Clusters, gaps, peaks & outliers.
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Probability Theory

Probability

Theoretical Probability vs. Experimental Probability
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Probability Rules

Probability Rules

Multiplication Rule (A and B)
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Dependent Probability

Dependent Probability

Dependent probability means the result of second event will change because of what happened first.
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Conditional Probability

Conditional Probability

It’s NOT just both events happened, it’s asking the probability of one event AFTERanother event happened. It’s based on a happened event…
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Central Limit Theorem & Law of Large Numbers

Central Limit Theorem & Law of Large Numbers

Refer to article: Central Limit Theorem and Law of Large Numbers
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