label arrow for tree diagram

Question

Kindly I want to ask how I can plot a diagram like the attached one on latex?
Thanks
Here is what I have already done:
   begin{tikzpicture}[>=latex']
    tikzset{block/.style= {draw,rectangle,align=center,minimum width=2cm,minimum height=1cm}}
    node [block]     (n0)  {Shooping intention};
    node [block, above left =3cm of n0](n1)   {Country};
    node [block, below =3cm of n1 ]       (n2)     {Gastronomic culture };
    node [block, below =3cm of n2]      (n3)        {Product Evaluation};
    
       node [block, right =3cm of quality](n4)   {Gender};
       
    path[draw]
        (n0.west) edge[->]  (n1.east) 
        (n0.west) edge[->] (n2.east)
        (n0.west) edge[->] (n3.east)
        (n0.east) edge[->] (n4.west)
    ;
end{tikzpicture}

Just I want to know how I can put the number on the arrow?

Zarko · Accepted Answer

One more, more complete mimic of the image shown in your question, using tikz package:
documentclass[tikz, margin=3mm]{standalone}
usetikzlibrary{arrows.meta,
                fit,
                positioning,
                quotes,
                shapes.geometric}

begin{document}
    begin{tikzpicture}[
node distance = 8mm and 24mm,
   arr/.style = {-Stealth, semithick},
     E/.style = {ellipse, draw, semithick,
                 text width=#1, aspect=1.2, align=center,
                 inner xsep=0pt, outer sep=0pt},
   E/.default = 5.4em,
every edge quotes/.style = {auto, font=footnotesize, inner sep=2pt, sloped},
every label/.style = {label distance=3pt, inner sep=2pt,
                      font=small}   
                        ]
node (n0)  [E]                 {Country of origin};
node (n1)  [E, above=of n0]    {Gastronomic culture};
node (n2)  [E, below=of n0]    {Product Evaluation};
node (n3)  [E, label=below:{$R^2=0.235$},
             right=of n0]       {Shooping intention};
node (n4)  [E=3em, label={[name=n4L]below:Control},
             right=of n3]       {Gender};
node [draw, dashed, fit=(n4) (n4L)]  {};
%
draw   (n1) edge["$0.166^{*}$"]    (n3)
        (n0) edge["$0.280^{**}$"]   (n3)
        (n2) edge["$0.256^{***}$"]  (n3)
        (n3) edge["$-0.224^{***}$"] (n4);
    end{tikzpicture}
end{document}

In comparison to your MWE are added labels to arrows using quotes library, nodes have elliptic shapes, added are labels to nodes.

js bibra · Answer

Different ways of putting a label on an arrow are as below

begin{tikzpicture}[>=latex',  node distance=3cm and 4cm, ]
tikzset{block/.style= {draw,rectangle,align=center,minimum width=2cm,minimum 
height=1cm}}
node [block]                   (n0)  {Shooping intention};
node [block, above left =of n0](n1)   {Country};
node [block, below =of n1 ]     (n2)     {Gastronomic culture };
node [block, below =of n2]      (n3)        {Product Evaluation};

node [block, right =of n0](n4)   {Gender};

path[draw]
(n0.west) edge[->]node[pos=0.5,above,sloped,](){XXX}  (n1.east) 
(n0.west) edge[->]node[midway, label=90:pqrs,](){} (n2.east)
(n0.west) edge[->]node[midway, label={[label distance=-4pt,rotate=45]135:$555$}](){} 
(n3.east)
(n0.east) edge[->] node[midway, label=-90:abcd,](){}(n4.west)
;
end{tikzpicture}

Bernard · Answer

For fun, a short pstricks code reproducing (more or less faithfully) the image in the O.P.
documentclass{article}%[border=12pt]{standalone}
usepackage{newtxtext, newtxmath} 
usepackage[usestackEOL]{stackengine} 
usepackage{bigstrut}
setlength{bigstrutjot}{2ex}
 usepackage{pst-node}

begin{document}
%
psset{arrows=->, arrowinset=0.15, linewidth=0.5pt, nodesep=3pt, labelsep=2pt}
small
 begin{psmatrix}[mnode=oval, colsep=3cm, rowsep=1cm]
%%% nodes
[name=Co] Centerstack{Countryof origin} 
[name=Ga]Centerstack{Gastronomicculture} & [name=Si]Centerstack{Shoppingintention} & [name=Ge]Centerstack{Genderbigstrut[b] } 
[name=Pe]Centerstack{Productsevaluation}
 %%% arrows
psset{arrows=->, arrowinset=0.15, arrowsize=2pt, nodesep=0pt, npos=0.4}
  ncline{Co}{Si}naput[nrot=:U]{$ 0.166^*$}
  ncline{Ga}{Si}naput{$ 0.280^{***}$}
  ncline{Pe}{Si}naput[nrot=:U]{$ 0.256^{***}$}
  ncline{Ge}{Si}nbput{$- 0.224^{***}$}
%%% misc
uput{2.5em}[d](Si){$mathrm{R}^2=0.236$}
uput{2.67em}[d](Ge){rnode{Co}{Control}}
uput{1.5em}[u](Ge){pnode{U}}
ncbox[nodesep=.2cm,boxsize=0.85, linearc=.1, linestyle=dashed, dash =4pt 2.5pt]{Co}{U}
end{psmatrix}

end{document}

label arrow for tree diagram

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