Standard Deviation: Variation from the Mean

What is Standard Deviation? Standard Deviation (SD) is the statistical measure of how spread out the values of a data set are from the mean or average number. In short, it measures the variation of the values from the mean.  The closer the values are to the mean, the lesser they are spread out, which also yields to a small …

Degrees to Radians: Convert & Calculate

We use different measurement units to determine length (in, m, or km), mass (kg, mg, or g), or temperature (Celsius or Fahrenheit) and Math enables us to convert between these measurement units. In the same way, a circle’s angle can be measured in two ways: with degrees and with radians and using formulas, we can convert between the two. What …

Interval Notation: Writing & Graphing

Let’s learn how to write and graph interval notation. What is an Interval Notation? Interval notation is a way of writing solutions to algebraic inequalities. You may recall that inequalities are relations that compare non-equal mathematical expressions. The four inequality signs are: less than (<), greater than (>), less than or equal (≤), and greater than or equal (≥). Here …

Probability: Figuring Out the Odds

Let’s learn about basic probability. What is Probability? Probability is the likelihood of something to happen. It ranges between zero (0) or impossible to one (1) or certain and will never be less than 0 or more than 1. Probability can be expressed in fraction, decimal, or percentage. For example, here are some probabilities: A pig talking is 0 or …

Linear Equations: Formula & Examples

Let’s learn about linear equations. What is a Linear Equation? A linear equation is the equation for a straight line. It’s a combination of constants and variables and is probably the simplest algebraic equations you’ll have to deal with. The standard form of linear equation is expressed in the formula:Ax + By + C = 0where A, B, and C …

Quadratic Formula: Equation & Examples

Let’s learn how to use the quadratic formula. Using the quadratic formula is one of the methods used in solving quadratic equations, especially when the equation cannot be solved by factoring. The quadratic formula solves any quadratic equation in the standard form: ax2+bx+c = 0, where a ≠ 0. So, make sure the equation you’re working on is in the …

Mean Median Mode: Measures for Data Sets

Let’s learn how to determine the mean, median, and mode. Once in a while, you probably stare at a group of numbers – grocery prices, scores in a test, monthly sales, ages of your family members – and think how to make sense of them. These groups of numbers are also called data sets. A data set is a collection …