https://gdpark.blog/tags/sample-variance/Recent content in Sample Variance on gdpark.blogHugoenFri, 17 Nov 2017 00:00:00 +0000https://gdpark.blog/posts/statistics-01-introduction/Sun, 12 Nov 2017 00:00:00 +0000https://gdpark.blog/posts/statistics-01-introduction/A casual dive into why sample variance divides by n-1 and how we use samples to estimate population parameters without measuring absolutely everyone.https://gdpark.blog/posts/statistics-05-derivation-of-the-chi-squared-distribution/Fri, 17 Nov 2017 00:00:00 +0000https://gdpark.blog/posts/statistics-05-derivation-of-the-chi-squared-distribution/Chi-squared is just a gamma in disguise — we prove Z² follows it with 1 degree of freedom and show how sample variance ties in before jumping to the t-distribution.