# Search Results (69)

View
Selected filters: Conditions of Use:
Remix and Share
Rating

To add the vectors (x₁,y₁) and (x₂,y₂), we add the corresponding components from each vector: (x₁+x₂,y₁+y₂). Here's a concrete example: the sum of (2,4) and (1,5) is (2+1,4+5), which is (3,9). There's also a nice graphical way to add vectors, and the two ways will always result in the same vector.​​

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Describe a bivariate relationship's linearity, strength, and direction. In other words, plotting things that take two variables into consideration and trying to see whether there's a pattern with how they relate.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

This is a brief conditional probability examplediscussing probabilities like P(A | B) using breakfast and lunch as examples.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

This video talka about what is easily one of the most fundamental and profound concepts in statistics and maybe in all of mathematics. And that's the central limit theorem.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Understanding alternate coordinate systems. Created by Sal Khan.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise).

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Sal discusses the conditions of matrix dimensions for which addition or multiplication are defined. Created by Sal Khan.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Sociology often looks at different age cohorts. A cohort is simply a group of people, but here we're looking specifically at different age groups or generations, because these people all lived through the same certain events through a certain time that affected their lives similarly.

Subject:
Sociology
Material Type:
Lesson
Provider:
Author:
Sydney Brown
02/28/2018 Conditions of Use:
Remix and Share
Rating

Dimension of the Column Space or Rank. Created by Sal Khan.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Dimension of the Null Space or Nullity. Created by Sal Khan.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

This video defines the differences between discrete and continuous random variables, then works through examples of each.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
02/28/2018 Conditions of Use:
Remix and Share
Rating

Where we live in society plays a huge role in the environmental benefits and risks that we're exposed to.

Subject:
Sociology
Material Type:
Lesson
Provider:
Author:
02/28/2018 Conditions of Use:
Remix and Share
Rating

Compare distributions using the features of shape, center, spread, and outliers.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
02/28/2018 Conditions of Use:
Remix and Share
Rating

Overview of the Intermediate Value Theorem, the Extreme Value Theorem and the Mean Value Theorem.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Short video which describes the difference between a sample and a population.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Sal shows examples of intersection and union of sets and introduces some set notation.

Subject:
Statistics and Probability
Material Type:
Lesson
Provider:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

We've learned about matrix addition, matrix subtraction, matrix multiplication. So you might be wondering, is there the equivalent of matrix division? And before we get into that, let me introduce some concepts to you. And then we'll see that there is something that maybe isn't exactly division, but it's analogous to it.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

Sal checks whether the commutative property applies for matrix multiplication. In other words, he checks whether for any two matrices A and B, A*B=B*A (the answer is NO, by the way). Created by Sal Khan.

Subject:
Algebra
Material Type:
Lesson
Provider:
Provider Set:
Author:
Salman Khan
02/28/2018 Conditions of Use:
Remix and Share
Rating

This 10-minute video lesson looks at Determinants: Finding the determinant of a 3x3 matrix.

Subject:
Algebra
Material Type:
Lecture
Provider:
Provider Set:
Author:
Khan, Salman
02/20/2011 Conditions of Use:
Remix and Share
Rating

This 22-minute video lesson shows another example of a projection matrix. It shows how to figure out the transformation matrix for a projection onto a subspace by figuring out the matrix for the projection onto the subspace's orthogonal complement first.

Subject:
Algebra
Material Type:
Lecture
Provider: