Question 1143422
<pre>
With a TI-83 or 84


2ND VARS 3 

with area:55, <font face="symbol">m</font>:0, <font face="symbol">s</font>:1, left tail, invNorm(0.55,0,1), or invNorm(0.55,0,1,LEFT)

or just:

invNorm(0.55)   

then press ENTER

0.1256613375, round to 0.13 

Edwin</pre>