Notation

$x$ in Algebra vs Stats

Similarities

• Represent the value of some quality
• Variables can be discrete or continuous
• Can be part of a larger calculation
  • For example, $2x$ could be double the heights of everyone.
  • This is known as [[Stats - Coding]]^A.

Differences

• Variables can represent multiple objects, like a set.
• Can do operations on $x$ like it’s a collection of values:
  • $\sum x$, the sum of all values in $x$
  • $\bar{x}$, the mean of all values in $x$.