摘要:Wright’s F‑statistics, and especially FST, provide important insights into the evolutionary processes that influence the structure of genetic variation within and among populations, and they are among the most widely used descriptive statistics in…
Machine learning Machine learning is a scientific discipline that explores the construction and study of algorithms that can learn from data. Such algorithms operate by building a model based on inputs and using that to make predictions or decisions,…
引言 Introduction 需要特别说明,spm是每一个体素为单位,计算统计量,进行t检验. 1.分别在每个体素上做方差分析; 2.对每个体素的方差分析结果,计算t检验统计量; 3.计算等同于t检验统计量的z值; 4.绘制一副t检验统计量map,或者z值map; 5.利用随机场理论,纠正统计检验结果的显著性水平. 命名说明 Naming of parts observation = a voxel value, in the voxel we are analysing, for one…
已知数据x,希望得到未知label y,即得到映射x-->y: 几个概念: 1)p(x): data distribution 数据分布 2)p(y): prior distribution 先验分布 a priori: Knowable without appeal to particular experiencea priori distribution: special meaning, do not misuse 3)p(x, y): join distribution 联合分布 4…
The Lady Tasting Tea - How Statistics Revolutionized Science in the Twentieth Century 本书只讨论了20世纪这100年间的统计大变革. 一般的书读读就行,唯独这本书需要慢慢品读,让统计的思想深入骨髓. 这本书不适合空读,而要结合自己对统计学的理解来读,遇到不懂的时候不要跳过,停下来仔细查阅相关资料,而后一旦理解了书中的总结,就很难忘记了. 需要做的事: 深刻揣摩每段历史中核心的统计学问题: 整理书中的天才们,出现…
3. Bayesian statistics and Regularization Content 3. Bayesian statistics and Regularization. 3.1 Underfitting and overfitting. 3.2 Bayesian statistics and regularization. 3.3 Optimize Cost function by regularization. 3.3.1 Regularized linear regressi…
二项分布 | Binomial distribution 泊松分布 | Poisson Distribution 正态分布 | Normal Distribution | Gaussian distribution 负二项分布 | Negative binomial distribution 指数分布 | Exponential Distribution Βeta分布 | beta distribution Βeta二项分布 | Beta-binomial distribution 几何分布…
T distribution 定义 在概率论和统计学中,学生t-分布(t-distribution),可简称为t分布,用于根据小样本来估计 呈正态分布且方差未知的总体的均值.如果总体方差已知(例如在样本数量足够多时),则应该用正态分布来估计总体均值. In probability and statistics, Student's t-distribution (or simply the t-distribution) is any member of a family of continuo…
1. https://www.pythian.com/blog/statistics-gathering-and-sql-tuning-advisor/ Our monitoring software found a long running job on one of our client’s databases. The job was an Oracle’s auto task running statistics gathering for more than 3 hours. I wa…
Common sense reduced to computation - Pierre-Simon, marquis de Laplace (1749–1827) Inventor of Bayesian inference 贝叶斯方法的逻辑十分接近人脑的思维:人脑的优势不是计算,在纯数值计算方面,可以说几十年前的计算器就已经超过人脑了. 人脑的核心能力在于推理,而记忆在推理中扮演了重要的角色,我们都是基于已知的常识来做出推理.贝叶斯推断也是如此,先验就是常识,在我们有了新的观测数据后,就可以…
