What it means
A line over a letter. In statistics x̄ is the mean of a sample. In complex numbers z̄ is the conjugate. Over a set it can mean the closure or the complement.
Read aloud in real formulas
x̄ = (1/n) ∑ᵢ xᵢ
Aethel says
x bar equals the quantity 1 over n, times the sum over i of x sub i
the sample mean
z z̄ = |z|²
Aethel says
z z bar equals the absolute value of z, squared
a number times its conjugate
Typing it
- LaTeX
- \bar{x}, \overline{xy}
- Unicode
- U+0304
Questions
How do you say x̄ out loud?
It is usually read “bar”, and also “x bar”.
What does x̄ mean in maths?
A line over a letter. In statistics x̄ is the mean of a sample. In complex numbers z̄ is the conjugate. Over a set it can mean the closure or the complement.
How do you type x̄?
In LaTeX, write \bar{x}, \overline{xy}. Its Unicode code point is U+0304.