Use the empirical rule to determine the approximate probability that a z value is between 0 and 1 on the standard normal curve.
You need to use a table of standar normal distribution curve. There are different kind of tables (cumulative, fi function, stc..), but your anwer is:
The empirical rule allows you to make a quick assessment of probability without using a table. Just memorise these three numbers:
The same goes for values below