If your table has negative values in the z-column, find 0.6293 in the body of
the table, and you'll find 0.3 in the z-column and 0.03 in the heading of the
column, so the z-score is 0.33.
If your table has only positive values in the z-column, subtract 0.6293-0.5
getting 0.1293. Find that in the body of the table, and you'll find 0.3 in the
z-column and 0.03 in the heading of the column, so the z-score is 0.33.
Edwin