Directional statistics

Multivariable Calculus | The gradient and directional derivatives.

We define the gradient of a function and show how it is helpful in finding the directional derivative. http://www.michael-penn.net http://www.randolphcollege.edu/mathematics/

From playlist Multivariable Calculus

Directional derivative of f(x,y)

Free ebook http://tinyurl.com/EngMathYT I present an example where I calculate the derivative of a function of two variables in a particular direction. In particular, I take the derivative of $f(x,y) := 1 - x^2/2 - y^4/4$ in the direction of the vector ${\bf u} := (1,1)$. I solve the

From playlist Engineering Mathematics

Mean, Median, and Mode

This video explains how to determine mean, median and mode. It also provided examples. http://mathispower4u.yolasite.com/

From playlist Statistics: Describing Data

11_5_1 Directional Derivative of a Multivariable Function Part 1

Understanding that a partial derivative refers to a rate of change in the direction of a certain axis, we now look at the rate of change in any direction. The direction is indicated by a unit vector, in other words it has a dimension of one and is therefore only its direction is important

From playlist Advanced Calculus / Multivariable Calculus

Determining Velocity, Speed, and Acceleration Using a Vector Valued Function

This video explains how to determine the velocity, speed, and acceleration given a vector valued function. http://mathispower4u.yolasite.com/

From playlist Vector Valued Function

Measures of Spread Overview

Introduction to standard deviation, IQR [Inter-Quartile Range], and range

From playlist Unit 1: Descriptive Statistics

Directional Derivatives

http://mathispower4u.wordpress.com/

From playlist Functions of Several Variables - Calculus

Statistics Lecture 3.3: Finding the Standard Deviation of a Data Set

https://www.patreon.com/ProfessorLeonard Statistics Lecture 3.3: Finding the Standard Deviation of a Data Set

From playlist Statistics (Full Length Videos)

Introduction to Vectors (2D)

This video introduces vectors and vector vocabulary. Search all videos at http://mathispower4u.wordpress.com/

From playlist Vectors in 2D

Efficiently Learning Mixtures of Gaussians - Ankur Moitra

Efficiently Learning Mixtures of Gaussians Ankur Moitra Massachusetts Institute of Technology January 18, 2011 Given data drawn from a mixture of multivariate Gaussians, a basic problem is to accurately estimate the mixture parameters. We provide a polynomial-time algorithm for this proble

From playlist Mathematics

Nexus Trimester - Ioannis Kontoyiannis (Athens U of Econ & Business)

Testing temporal causality and estimating directed information Ioannis Kontoyiannis (Athens U of Econ & Business) March 18, 2016 Abstract: The problem of estimating the directed information rate between two Markov chains of arbitrary (but finite) order is considered. Specifically for the

From playlist 2016-T1 - Nexus of Information and Computation Theory - CEB Trimester

Subject- vs. group-level analyses

This video lesson is part of a complete course on neuroscience time series analyses. The full course includes - over 47 hours of video instruction - lots and lots of MATLAB exercises and problem sets - access to a dedicated Q&A forum. You can find out more here: https://www.udemy.

From playlist NEW ANTS #5) Permutation-based statistics

Choosing a Test, Hypothesis, and Level of Significance for Hypothesis testing (Steps 1-3) (Week 14C)

In the first step of hypothesis testing we choose the test we will use by examining the level of the data. Next, based on that test, we establish a null and alternative hypothesis. Third, we determine a criteria by which we will determine statistical significance. Lecture date: Tuesday,

From playlist Basic Business Statistics (QBA 237 - Missouri State University)

DIRECTIONAL vs. Non-Directional Alternative Hypothesis: One or Two Tails (14-7)

In Step 2, we established an alternative hypothesis. Alternative hypotheses can be either directional or non-directional. Direction refers to the direction that the Dependent Variable (DV) changes. A one-tailed test is used when you predict both the relationship and the direction of change

From playlist Hypothesis Testing Introduction WK 14 QBA 237

One Sample z Test Framework with Social Media Example (15-2)

The one sample z test is a parametric procedure that tests whether a single sample mean is significantly different than a population mean when the standard deviation of the population (σ) is KNOWN. We will learn the research design for the IV and DV, the assumptions for the test, how to se

From playlist Single-Sample Hypothesis Tests (z, t, & p) - WK 15 QBA 237

Professor Gareth Roberts: "New challenges in Computational Statistics"

The Turing Lectures: Statistics - Professor Gareth Roberts, University of Warwick “New challenges in Computational Statistics” Click the below timestamps to navigate the video. 00:00:09 Welcome by Professor Patrick Wolfe 00:01:44 Introduction by Professor Sofia Olhede 00:03:2

From playlist Turing Lectures

Sayan Mukherjee (10/21/14): Stochastic topology and statistical persistence

From playlist AATRN 2014

Assumptions: Spotting SKEWNESS in a Distribution (6-2)

Skewness is a measure of the imbalance or asymmetry of a data distribution. The skewness value can be positive, zero, negative, or undefined. Skewness can be caused when outliers exist on one end of a distribution and pull the mean toward the outlier. The skew is in the tail of the distrib

From playlist Depicting Distributions from Boxplots to z-Scores (WK 6 QBA 237)

The Null Hypothesis and Alternative Hypothesis in Statistics Testing

We explore the null and alternative hypothesis used in significance testing. I explain how the null hypothesis is created and then how to follow with either a directional or non-directional (one-tailed vs. two-tailed) alternative hypothesis. You get some practice identifying and creating b

From playlist Business Statistics Lectures (FA2020, QBA337 @ MSU)

Calculus 3 Lecture 13.6: Finding Directional Derivatives and Gradients

Calculus 3 Lecture 13.6: Finding Directional Derivatives and Gradients: How to find a Directional Derivative along the path of any given vector. Also, an introduction to the Gradient and some basics on how it is used.

From playlist Calculus 3 (Full Length Videos)