Season
Season 1 Episode
- Season 1 What Is Statistics
- Season 1 Mathematical Thinking
- Season 1 Mean, Median, and Mode: Measures of Central Tendency
- Season 1 Measures of Spread
- Season 1 Charts Are Like Pasta - Data Visualization Part 1
- Season 1 Plots, Outliers, and Justin Timberlake: Data Visualization Part 2
- Season 1 The Shape of Data: Distributions
- Season 1 Correlation Doesn’t Equal Causation
- Season 1 Controlled Experiments
- Season 1 Sampling Methods and Bias with Surveys
- Season 1 Science Journalism
- Season 1 Henrietta Lacks, the Tuskegee Experiment, and Ethical Data Collection
- Season 1 Probability Part 1: Rules and Patterns
- Season 1 Probability Part 2: Updating Your Beliefs with Bayes
- Season 1 The Binomial Distribution
- Season 1 Geometric Distributions and The Birthday Paradox
- Season 1 Randomness
- Season 1 Z-Scores and Percentiles
- Season 1 The Normal Distribution
- Season 1 Confidence Intervals
- Season 1 How P-Values Help Us Test Hypotheses
- Season 1 P-Value Problems
- Season 1 Playing with Power: P-Values Pt 3
- Season 1 You Know I’m All About that Bayes
- Season 1 Bayes in Science and Everyday Life
- Season 1 Test Statistics
- Season 1 T-Tests: A Matched Pair Made in Heaven
- Season 1 Degrees of Freedom and Effect Sizes
- Season 1 Chi-Square Tests
- Season 1 P-Hacking
- Season 1 The Replication Crisis
- Season 1 Regression
- Season 1 ANOVA
- Season 1 ANOVA Part 2: Dealing with Intersectional Groups
- Season 1 Fitting Models Is like Tetris
- Season 1 Supervised Machine Learning
- Season 1 Unsupervised Machine Learning
- Season 1 Intro to Big Data
- Season 1 Big Data Problems
- Season 1 Statistics in the Courts
- Season 1 Neural Networks
- Season 1 War
- Season 1 When Predictions Fail
- Season 1 When Predictions Succeed
Crash Course Statistics - Season 1 Episode 18 Z-Scores and Percentiles
2.00 13 minutes Today we’re going to talk about how we compare things that aren’t exactly the same - or aren’t measured in the same way. For example, if you wanted to know if a 1200 on the SAT is better than the 25 on the ACT. For this, we need to standardize our data using z-scores - which allow us to make comparisons between two sets of data as long as they’re normally distributed. We’ll also talk about converting these scores to percentiles and discuss how percentiles, though valuable, don’t actually tell us how “extreme” our data really is.
