Question 1162546

More than the mean is 50%
(x-mean)/sd or between (40000-36280)/3300 and (45000-36280)/3300
this is z between 1.13 and 2.64
0.1251 is probability or 12.51%

calculator makes it a lot easier 2nd VARS 2 normalcdf ENTER (40000,45000,36280,3300) ENTER
get 0.1257 (no rounding) or 12.57%