Inferential Statistics Generalizing from a sample to a population that involves determining how far sample statistics are likely to vary from each other and from the population parameter. Sampling Distribution The sampling distribution of a statistic…

基本概念 样本空间: 随机试验E的所有可能结果组成的集合, 为E的样本空间, 记为S 随机事件: E的样本空间S的子集为E的随机事件, 简称事件, 由一个样本点组成的单点集, 称为基本事件 对立事件/逆事件: 若A并B=S, 且A交B=空, 则称A与B互为逆事件, A与B互为对立事件. A上面加一横即A的逆事件 频率: 在相同的条件下进行了n次试验, 事件A发生的次数为A的频数, 与n的比值成为A的频率 概率: 设E为随机试验, S是E的样本空间, 对于E的每一个事件A赋予一个实数, 记为P(A…

Stat2.3x Inference(统计推断)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Estimating population means and percents Sampling assumptions: Simple Random Sample (SRS) Large enough so that the probability histo…

 Nested SELECT quiz bbc name region area population gdp Afghanistan South Asia 652225 26000000   Albania Europe 28728 3200000 6656000000 Algeria Middle East 2400000 32900000 75012000000 Andorra Europe 468 64000   Bangladesh South Asia 143998 15260000…

统计检验是将抽样结果和抽样分布相对照而作出判断的工作.主要分5个步骤: 建立假设 求抽样分布 选择显著性水平和否定域 计算检验统计量 判定 -- 百度百科 假设检验(hypothesis test)亦称显著性检验(significant test),是统计推断的另一重要内容,其目的是比较总体参数之间有无差别.假设检验的实质是判断观察到的"差别"是由抽样误差引起还是总体上的不同,目的是评价两种不同处理引起效应不同的证据有多强,这种证据的强度用概率P来度量和表示.除t分布外,针对不同的资料…

Statistical approaches to randomised controlled trial analysis The statistical approach used in the design and analysis of the vast majority of clinical studies is often referred to as classical or frequentist. Conclusions are made on the results of…

Sampling and Estimation Sampling Error Sampling error is the difference between a sample statistic(the mean, variance, or standard deviation of the sample) and its corresponding population parameter(the true mean, variance, or standard deviation of t…

Two Types of Estimation One of the major applications of statistics is estimating population parameters from sample statistics. There are types of estimation: Point Estimate: the value of sample statistics Point estimates of average height with multi…

[原文链接:http://engineering.richrelevance.com/recommendations-thompson-sampling/.] [本文链接:http://www.cnblogs.com/breezedeus/p/3775339.html,转载请注明出处] Recommendations with Thompson Sampling 06/05/2014 • Topics: Bayesian, Big data, Data Science by Sergey Fel…

The Basics of Probability Probability measures the amount of uncertainty of an event: a fact whose occurence is uncertain. Sample space refers to the set of all possible events, denoted as . Some properties: Sum rule: Union bound: Conditional probabi…