In statistics, the mean percentage error (MPE) is the computed average of percentage errors by which forecasts of a model differ from actual values of the quantity being forecast. The formula for the mean percentage error is: where at is the actual value of the quantity being forecast, ft is the forecast, and n is the number of different times for which the variable is forecast. Because actual rather than absolute values of the forecast errors are used in the formula, positive and negative forecast errors can offset each other; as a result the formula can be used as a measure of the bias in the forecasts. A disadvantage of this measure is that it is undefined whenever a single actual value is zero. (Wikipedia).
From playlist a. Numbers and Measurement
Statistics: Ch 7 Sample Variability (11 of 14) What is "The Standard Error of the Mean"?
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 What is “the standard error of the mean”? It is the standard deviation (of the sampling distribution) of the sample means. Previous
From playlist STATISTICS CH 7 SAMPLE VARIABILILTY
Chapter 2 - Error and Percentage Error - IB Math Studies (Math SL)
Hello and welcome to What The Math. This is a Chapter 2 video about error and percentage error calculation. This is a part of Chapter 2. This is from Harris Publication version of IB math book by Haese.
From playlist IB Math Studies Chapter 2
How To Find The Z Score, Confidence Interval, and Margin of Error for a Population Mean
This statistics video tutorial explains how to find the z-score that will be used to find the confidence interval and margin of error for a population mean. This video contains 2 example problems in which you're asked to find a 90% and 95% confidence interval given the population standard
From playlist Statistics
Lesson: Calculate a Confidence Interval for a Population Proportion
This lesson explains how to calculator a confidence interval for a population proportion.
From playlist Confidence Intervals
Convert a Fraction of a Percent to a Decimal and a Fraction
This video explains how to convert a fraction of a percentage to a decimal and a fraction. http://mathispower4u.com
From playlist Introduction to Percentages
Percent Intro and Basic Percent, Fraction, Decimal Conversions (No Calculator)
This video defines a percent and explains how to perform basic percent, fraction, and decimal conversions.
From playlist Introduction to Percentages
Error estimation via Partial Derivatives and Calculus
Free ebook http://bookboon.com/en/learn-calculus-2-on-your-mobile-device-ebook How to estimate errors in calculations using calculus.
From playlist A second course in university calculus.
topic 11 measurement and data processing
Lesson on the topic of 11 of IB Chemistry that of measurement and data processing.
From playlist IB Chemistry
Basic Excel Business Analytics #54: Basic Forecasting Methods & Measures of Forecast Error
Download files: https://people.highline.edu/mgirvin/AllClasses/348/348/AllFilesBI348Analytics.htm Learn about some Basic Forecasting Methods: 1) (00 Intro to Time Series and Forecasting 2) (02:10) Naïve Method or Most Recent Method for Forecasting 3) (04:34) Forecast Error and Mean Foreca
From playlist Excel Business Analytics (Forecasting, Linear Programming, Simulation & more) Free Course at YouTube (75 Videos)
Chapter 7.3: Estimating a Population Proportion and Sample Size
Chapter 7.3 from "Introduction to Statistics, Think & Do" by Scott Stevens (http://www.StevensStats.com) Textbook from Publisher, $29.95 print, $9.95 PDF http://www.centerofmathematics.com/wwcomstore/index.php/thinkdov4-1.html Textbook from Amazon: https://amzn.to/2zJRCjL
From playlist Statistics Lecture Videos
OCR MEI Statistics Minor J: Poisson Distribution: 12 Approximating a Binomial
https://www.buymeacoffee.com/TLMaths Navigate all of my videos at https://sites.google.com/site/tlmaths314/ Like my Facebook Page: https://www.facebook.com/TLMaths-1943955188961592/ to keep updated Follow me on Instagram here: https://www.instagram.com/tlmaths/ Many, MANY thanks to Dea
From playlist OCR MEI Statistics Minor J: Poisson Distribution
RubyConf 2016 - Improving Coverage Analysis by Ryan Davis
RubyConf 2016 - Improving Coverage Analysis by Ryan Davis If you follow modern practices, test coverage analysis is a lie, plain and simple. What it reports is a false positive and leaves you with a false sense of security, vulnerable to regression, and unaware that this is even the case.
From playlist RubyConf 2016
A-Level Maths: E2-05 Small-Angle Approximation: Percentage Error Investigation
Navigate all of my videos at https://sites.google.com/site/tlmaths314/ Like my Facebook Page: https://www.facebook.com/TLMaths-1943955188961592/ to keep updated Follow me on Instagram here: https://www.instagram.com/tlmaths/ My LIVE Google Doc has the new A-Level Maths specification and
From playlist A-Level Maths E2: Small-Angle Approximation
The Stock Market - Can we predict it?
Yes but no. Let's use a regression approach to try to predict the markets. We also go through a better evaluation function that can see through the apparent "amazing performance" of our model CODE: https://github.com/ajhalthor/stock-price-prediction Daily Google Trend Code used in video:
From playlist Time Series Forecasting
This video explains how to calculate the percent error of an experiment the simple way! Subscribe: https://www.youtube.com/channel/UCEWpbFLzoYGPfuWUMFPSaoA?sub_confirmation=1 Access to Premium Videos: https://www.patreon.com/MathScienceTutor https://www.facebook.com/MathScienceTutoring/
From playlist New AP & General Chemistry Video Playlist
Lect.9C: Sample Size Determination Lecture 9
Lecture with Per B. Brockhoff. Lecrture 9. Chapters: 00:00 - Sample Size Determintaion; 05:00 - Example 1 - Continued;
From playlist DTU: Introduction to Statistics | CosmoLearning.org