4

enter image description here

I noticed that the letter z is different from other font. Is there any special command for this?

  • 1
    italic z in Times-like fonts, such as mathptmx. – Steven B. Segletes Apr 18 at 0:21
  • It's just how a font realizes the italic z. Nothing special about z-score. – egreg Apr 18 at 7:42
16

Times font in both cases. The difference is italic versus upright. Kerning is slightly different if employed as math versus italic.

\documentclass{article}
\usepackage{newtxtext,newtxmath}
\begin{document}
$z$-score

\textit{z}-score
\end{document}

enter image description here

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