Statistical ratios | Statistical tests | Summary statistics
The Lexis ratio is used in statistics as a measure which seeks to evaluate differences between the statistical properties of random mechanisms where the outcome is two-valued — for example "success" or "failure", "win" or "lose". The idea is that the probability of success might vary between different sets of trials in different situations. This ratio is not much used currently having been largely replaced by the use of the chi-squared test in testing for the homogeneity of samples. This measure compares the between-set variance of the sample proportions (evaluated for each set) with what the variance should be if there were no difference between in the true proportions of success across the different sets. Thus the measure is used to evaluate how data compares to a fixed-probability-of-success Bernoulli distribution. The term "Lexis ratio" is sometimes referred to as L or Q, where Where is the (weighted) sample variance derived from the observed proportions of success in sets in "Lexis trials" and is the variance computed from the expected Bernoulli distribution on the basis of the overall average proportion of success. Trials where L falls significantly above or below 1 are known as supernormal and subnormal, respectively. This ratio ( Q ) is a measure that can be used to distinguish between three types of variation in sampling for attributes: Bernoullian, Lexian and Poissonian. The Lexis ratio is sometimes also referred to as L. (Wikipedia).
This video defines a ratio and provides several examples on how to write a ratio and shows how to simplify a ratio. http://mathispower4u.wordpress.com/
From playlist Ratios and Rates
This is a short video tutorial on equivalent ratios. ✤ ✤ ✤ INTERACTIVE APPLETS AND WORKSHEETS ✤ ✤ ✤ http://fearlessmath.net ✤ ✤ ✤ FOLLOW ME ON TWITTER ✤ ✤ ✤ http://twitter.com/dhabecker
From playlist All about ratios and proportions
Identifying and solving proportions
This is a short video tutorial on identifying and solving proportions. For interactive applets, worksheets, and more videos go to http://www.mathvillage.info
From playlist All about ratios and proportions
Introduction to Ratios (2 of 2: Equivalent Ratios)
More resources available at www.misterwootube.com
From playlist Basic Ratios & Rates
From playlist CS50 Sections 2012
This video introduces the Golden ratio and provides several examples of where the Golden ratio appears. http:mathispower4u.com
From playlist Mathematics General Interest
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From playlist Open QandA 2020
Case File Pupdate: Lexie Jane | Cesar 911
Find out how Lexie Jane and Holly's hikes are going after their work with Cesar. Has Holly learned how to control her over-protective terrier mix? ➡ Subscribe: http://bit.ly/NatGeoWILDSubscribe About Cesar 911: Cesar Millan is back in his element - rehabilitating dogs and training people
From playlist Cesar Millan | National Geographic
GCSE Maths Predicted Paper 3 Wednesday 14th June 2023 | Foundation | Exam Walkthrough | Edexcel AQA
Here is a practice paper that I have selected to help with the 2023 GCSE maths foundation paper 3 exam. I hope you enjoy it! Download the booklet here: https://1drv.ms/b/s!Ag8Cv-UM_XGOg84Uykksxp_H4XjPQA?e=MYYhFn Join this channel to get access to perks: https://www.youtube.com/channel/UC
From playlist 2023 Revision Videos and Practice Papers
From playlist CS50 Lectures 2012
Which typist is fast? Use ratios to compare the two typists. Move videos at http://www.MathVillage.info
From playlist All about ratios and proportions
GCSE Maths Predicted Paper 3 Wednesday 14th June 2023 | Higher | Exam Walkthrough | Edexcel AQA
Here is a practice paper that I have selected to help with the 2023 GCSE maths higher paper 3 exam. I hope you enjoy it! Download the booklet here: https://1drv.ms/b/s!Ag8Cv-UM_XGOg84V_oUCq1vZs7pr0g?e=0Cam0K Join this channel to get access to perks: https://www.youtube.com/channel/UCStPz
From playlist 2023 Revision Videos and Practice Papers
Gender Free Kids: Questioning Gender Based Prejudice (Education Documentary) | Real Stories
Is the way we treat boys and girls the real reason we haven't achieved equality between men and women? Dr Javid Abdelmoneim aims to find out by taking over a primary school class. Facebook - https://www.facebook.com/RealStoriesChannel Instagram - @realstoriesdocs Twitter: https://twitter.
From playlist Should Our kids Go Gender-Free? : Season 1
Learn how to take equivalent ratios and rewrite them into a ratio table. Then solve a proportion question with the table. http://www.MathVillage.info
From playlist All about ratios and proportions
Ratios Introduction - what are ratios?
Ratios are used to compare different quantities. In this introduction to ratios we will look at what ratios are, how we deal with ratios of different measurement units and that ratios can be simplified. To donate to the tecmath channel:https://paypal.me/tecmath To support tecmath on Pa
From playlist Ratios
27c3: Contemporary Profiling of Web Users
Speakers: Dominik Herrmann, lexi On Using Anonymizers and Still Get Fucked This talk will provide a summary of recently discovered methods which allow to break the Internet's privacy and anonymity. We will show, amongst others: * ways of distinguishing bots from humans. We use this
From playlist 27C3: We come in peace
This is a short video tutorial on unit ratios...also called unit rates. For interactive applets, worksheets, and more videos go to http://www.mathvillage.info
From playlist All about ratios and proportions
27c3: Contemporary Profiling of Web Users (en)
Speakers: Dominik Herrmann , lexi On Using Anonymizers and Still Get Fucked This talk will provide a summary of recently discovered methods which allow to break the Internet's privacy and anonymity. We will show, amongst others: •ways of distinguishing bots from humans. We use th
From playlist 27C3: We come in peace