An X mark (also known as an ex mark or a cross mark or simply an X or ex or a cross) is used to indicate the concept of negation (for example "no, this has not been verified", "no, that is not the correct answer" or "no, I do not agree") as well as an indicator (for example, in election ballot papers or in maps as an x-marks-the-spot). Its opposite is often considered to be the check mark or tick (or the O mark used in Japan and Korea). In Japanese, the X mark (❌) is called "batsu" (ばつ) and can be expressed by someone by crossing their arms. It is also used as a replacement for a signature for a person who is blind or illiterate and thus cannot write their name. Typically, the writing of an X used for this purpose must be witnessed to be valid. As a verb, to X (or ex) off/out or to cross off/out means to add such a mark. It is quite common, especially on printed forms and document, for there to be squares in which to place x marks, or interchangeably checks. It is also traditionally used on maps to indicate locations, most famously on treasure maps. It is also used as a set of three to mark jugs of moonshine for having completed all distillation steps, while additionally signifying its potency (as high as 150 proof) relative to legal spirits, which rarely exceed 80 proof (40% ABV). (Wikipedia).
Find x given the z-score, sample mean, and sample standard deviation
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From playlist Statistics
Finding the z-score of x with the formula
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From playlist Statistics
From playlist Sect 4.3, f, f' and f''
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From playlist Statistics
#5 Set Interval Notation Practice
Practice using set interval notation
From playlist Middle School This Year
Piecemeal Functions (1 of 2: Constructing the graph)
More resources available at www.misterwootube.com
From playlist Further Work with Functions (related content)
Multivariable Calculus The Limit of x/(x + y) as (x, y) approaches (0, 0)
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From playlist Calculus
A Gentle Introduction to z Scores (9-1)
A z score tells you how far a raw score deviates from the mean when measured in standard deviation units. There are two parts to a z score: the number and a sign. The sign tells you whether the z score is above or below the mean. The number tells distance between the score and mean in term
From playlist WK9 Using z Scores and the z Test in Statistics - Online Statistics for the Flipped Classroom
Computing z-scores(standard scores) and comparing them
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From playlist Statistics
Theory of Computation: More Turing Machines!
This video is for my Spring 2020 section of MA 342, for the class meeting on Wednesday April 8. Visit the class website for homework as usual! Fast forward music is from "Now Get Busy" by the Beastie Boys, licensed Creative Commons Noncommercial Sampling Plus.
From playlist Math 342 (Theory of Computation) Spring 2020
Even more Turing machines: Theory of Computation (Apr 13, 2021)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math & computer science majors at Fairfield University, Spring 2021. Class website: http://cstaecker.fairfield.edu/~cstaecker/courses/2021s3342/
From playlist Math 3342 (Theory of Computation) Spring 2021
More Turing machines: Theory of Computation (Apr 9, 2021)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math & computer science majors at Fairfield University, Spring 2021. Class website: http://cstaecker.fairfield.edu/~cstaecker/courses/2021s3342/
From playlist Math 3342 (Theory of Computation) Spring 2021
Computation Ep27, TMs with marking (Apr 5, 2022)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math and computer science majors at Fairfield University, Spring 2022. The course is about finite automata, Turing machines, and related topics. Homework and handouts at the class websi
From playlist Math 3342 (Theory of Computation) Spring 2022
Oh no! More TMs! and test review: Theory of Computation (Apr 14, 2021)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math & computer science majors at Fairfield University, Spring 2021. Class website: http://cstaecker.fairfield.edu/~cstaecker/courses/2021s3342/
From playlist Math 3342 (Theory of Computation) Spring 2021
Computation Ep29, Turing computability (Apr 18, 2022)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math and computer science majors at Fairfield University, Spring 2022. The course is about finite automata, Turing machines, and related topics. Homework and handouts at the class websi
From playlist Math 3342 (Theory of Computation) Spring 2022
Computation Ep28, More TMs (Apr 13, 2022)
This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math and computer science majors at Fairfield University, Spring 2022. The course is about finite automata, Turing machines, and related topics. Homework and handouts at the class websi
From playlist Math 3342 (Theory of Computation) Spring 2022
Bertrand Eynard: (Mixed) topological recursion and the two-matrix model - Lecture 2
Mini course of the conference "Noncommutative geometry meets topological recursion", August 2021, University of Münster. Abstract: In this series of lecture we will introduce the 2-matrix model and the issue of mixed traces, then we shall give the answers as formulas. Some formulas will be
From playlist Noncommutative geometry meets topological recursion 2021
Algebra & Geometry 1 (GCSE Higher Maths) - Exam Qs 26
Powered by https://www.numerise.com/ This video is a tutorial on Algebra & Geometry Questions. You should have already watched the Algebra & Geometry 1 Tutorial 25. This video is for students attempting the Higher paper AQA Unit 3 Maths GCSE, who have previously sat the foundation paper.
From playlist AQA Unit 3 Maths GCSE Higher Revision Course
GCSE Revision Video 13 - Trial & Improvement
Powered by https://www.numerise.com/ GCSE Revision Video 13 - Trial & Improvement
From playlist GCSE Quick Revision List
Symmetric Key Cryptography: The XOR Cipher
This is the fourth in a series about cryptography; an extremely important aspect of computer science and cyber security. It covers the XOR logical operation, that is the exclusive OR operation, explaining how it can be used to encrypt and decrypt a sequence of binary digits. XOR is an im
From playlist Cryptography