Math Glossary Letter Z
z score
the number of standard deviations from the mean a data point is. Also known as a standard score
z table
The table of probabilities assigned to a z-score
A number with no size or quantity. Neither positive or negative.

zero coupon bond
A bond where the face value is paid at the time of maturity. No coupons are paid.
zero multiplication property
The product of any number and zero is zero

A * 0 = 0
zodiac sign
an area of the sky that extends approximately 8° north or south of the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year