Using the table, give the percentage associated with each unit of standard deviation in the standard normal curve to the
nearest hundredth.
x
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
area, a(x) area, a(x)
0.0793 2.2 0.4861
0.1554 2.4 0.4918
0.2257 2.6 0.4953
0.2881 2.8 0.4974
0.3413 3.0 0.4987
0.3849 3.2 0.4993
0.4192 3.4 0.4997
0.4452 3.6 0.4998
0.4641 3.8 0.4999
0.4772 4.0 0.5000
standard deviation percentage area
-1 to 0
o to +1
o to +2
o to +3
-1 to +2