## Recently Published

##### Lesson 1

Simple questions for lesson 1 of stats.com introduction to R class

##### Embedding interactive graphics in a RPubs document

Shows a framework for embedding interactive grahics within an RPubs document.

##### Lesson 2

The questions (more or less) from lesson 2.

##### Some comments on <code>simulate.p.value</code> in <code>chisq.test</code>

Some comments on how the p-value is simulated in chisq.test

##### Lesson 2: R commands

A quiz/commentary on some of the R commands needed for lesson 2

##### StatisticsDotCom, R Intro, Lesson 2

A basic quiz on some of the topics of lesson 2.

##### The t distribution and the normal

A few graphics showing the difference between the t and the normal distributions.

##### Exponents and Logarithms

Some refresher notes for students in a calculus class at statistics.com

##### Quadratic equation

Some details on the quadratic equation

##### Trigonometry review for Statistics.com

A quick review of trigonometry for a calculus class at statistics.com

##### Negative log likelihood

Example of differentiating log likelihood to maximize.

##### Derivative of <code>|1-x^2|</code>

An explanation of the derivative of this function.