Question 449151
<pre>
If many samples of size 30 were drawn from a population 
and the means of all the samples were calculated and 
plotted, the shape of the distribution of sample means 
would be approximately normally distributed, that is, 
shaped like this: 

{{{drawing(400,200,5,15,10-.5,10+1.5, graph(400,200,5,15,10-.5,10+1.5, exp(-(x-10)^2/2)+10),  line(11,10+.05,11,10-.05),
 line(12,10+.05,12,10-.05), line(10,10+.05,10,10-.05),

 line(9,10+.05,9,10-.05),
 line(8,10+.05,8,10-.05),locate(14.7,10-.05,x),
locate(4.8,-.01,z),locate(4.8,.2,z),
line(4,10-.05,16,10-.05) 
)}}}
 
Edwin</pre>