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I have been trying to insert the function on my tikZ figure but it does not fit well. Can you guys help me drawing a figure equal to this?

enter image description here

davids_73
  • 89

1 Answers1

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I think you would be much faster converging to the desired result if you revealed what you have tried because that way you can learn yourself how to do such things. Maybe this does it, maybe not.

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{arrows.meta}
\usepackage{mathtools}
\begin{document}
\begin{tikzpicture}[>={Stealth[length=6pt]},declare function={g(\x)=2*exp(-\x*\x/3);
    xmax=3.5;xmin=-3.4;x0=1.5;ymax=2.75;}]
 \draw[gray!50] (-3.7,0) edge[->] (4,0) foreach \X in {-3.5,-3,...,3}
  {(\X,0) -- ++ (0,0.1)} (0,0) edge[->] (0,ymax);
 \fill[gray!60] plot[domain=x0:xmax,samples=15,smooth] (\x,{g(\x)}) -- (xmax,0) -| cycle;  
 \draw[thick] plot[domain=xmin:xmax,samples=51,smooth] (\x,{g(\x)}); 
 \path (4,0) node[below]{$x$} (x0,0) node[below]{$Z_{\mathrlap{1-\alpha}}$} 
  (0,ymax) node[right]{$f(x)$};
\end{tikzpicture}
\end{document}

enter image description here

  • Sorry, but I couldn't do much because I tried to insert the function as I am used to do, but I guess my scale was not nice. But thank you anyway – davids_73 Jun 01 '20 at 03:42