# Secondary Catalogue

## Mathematics

### Vertex, Axis, Focus, Directrix of a Hyperbola

Hyperbolas are conic sections that are like double parabolas. In this video we'll look at all the different geometric components of the graph of a hyperbola, including its vertex, axis, focus, and its directrix.

### Building Histograms from Data Sets

In this video we'll work on actually building a histogram from a data set. In order to build a histogram, we'll need to determine the class interval, which means we'll need to look at class width and class midpoint.

### Chi-Square Tests

In this video we'll look at several examples of different types of chi-square tests, including a test for homogeneity, a test for association/independence, and a goodness-of-fit test.

### Correlation Coefficient and the Residual

In this video we'll learn how to calculate the correlation coefficient and residual for a data set, and we'll look at how these values relate to the scatterplot of the data.

### Binomial Random Variables

Remember that “bi” means two, so a binomial variable is a variable that can take on exactly two values. A coin is the most obvious example of a binomial variable because flipping a coin can only result in two values: heads or tails.

### Measures of Spread

Range and interquartile range (IQR) are both measures of spread, also called measures of dispersion or scatter. They measure how much the data is spread out around the center point of the data set.

### Hypothesis Testing for the Population Proportion

In this video we'll look at how to run a full hypothesis test, from beginning to end, or a proportion, instead of a mean. We'll also consider what it looks like to run this as a one-tail test and as a two-tail test.

### Horizontal Line Test

Learn to use the horizontal line test to determine whether or not a function is 1-to-1.