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### Poisson process : Poisson Process 2

##### By: Sal Khan

More of the derivation of the Poisson Distribution.

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Binomial distribution : Binomial Distribution 3

##### By: Sal Khan

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Random variables and probability distributions : Expected Value: E(X)

##### By: Sal Khan

Expected value of a random variable

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Binomial distribution : Expected Value of Binomial Distribution

##### By: Sal Khan

Expected value of a binomial distributed random variable

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Random variables and probability distributions : Random Variables

##### By: Sal Khan

Basic idea and definitions of random variables

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Poisson process : Poisson Process 1

##### By: Sal Khan

Introduction to Poisson Processes and the Poisson Distribution.

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Random variables and probability distributions : Discrete and cont...

##### By: Sal Khan

Defining discrete and continuous random variables. Working through examples of both discrete and continuous random variables.

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Binomial distribution : Binomial Distribution 2

##### By: Sal Khan

More on the binomial distribution

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Binomial distribution : Binomial Distribution 1

##### By: Sal Khan

Introduction to the binomial distribution

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Binomial distribution : Binomial Distribution 4

##### By: Sal Khan

Using Excel to visualize the basketball binomial distribution

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Random variables and probability distributions : Law of Large Numbers

##### By: Sal Khan

Introduction to the law of large numbers

Random variables. Expected value. Probability distributions (both discrete and continuous). Binomial distribution. Poisson processes.

### Brain Teasers : Alien Abduction Brain Teaser

##### By: Sal Khan

Saving Earth from becoming a mushroom farm.

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

### Variance and standard deviation : Statistics: Standard Deviation

##### By: Sal Khan

Review of what we've learned. Introduction to the standard deviation.

Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.

### Brain Teasers : Light Bulb Switching Brain Teaser

##### By: Sal Khan

Turning light bulbs on and off.

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

### Linear regression and correlation : Calculating R-Squared

##### By: Sal Khan

Calculating R-Squared to see how well a regression line fits data

Fitting a line to points. Linear regression. R-squared.

### Variance and standard deviation : Variance of a population

##### By: Sal Khan

Variance as a measure of, on average, how far the data points in a population are from the population mean

Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.

### Measures of central tendency : Sample mean versus population mean.

##### By: Sal Khan

The conceptual and notational differences between a parameter for a population and a statistic calculated from a sample.

Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.

### Sal's old statistics videos : Statistics: The Average

##### By: Sal Khan

Introduction to descriptive statistics and central tendency. Ways to measure the average of a set: median, mean, mode

Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.

### Linear regression and correlation : Covariance and the Regression Line

##### By: Sal Khan

Covariance, Variance and the Slope of the Regression Line

Fitting a line to points. Linear regression. R-squared.

### Variance and standard deviation : Sample variance

##### By: Sal Khan

Thinking about how we can estimate the variance of a population by looking at the data in a sample.

Measures of central tendency and dispersion. Mean, median, mode, variance, and standard deviation.

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