STATISTICS ACTUAL EXAM WITH
CORRECT ANSWERS
1. rational number - ANSWER A number that can be written as a ratio of
integers, which means it can be written as a fraction.
2. product - ANSWER The result of multiplying values.
3. greatest common factor (GCF) - ANSWER The greatest number that is both
a factor of a and a factor of b.
4. factor tree - ANSWER A graphical method used to identify the prime
factorization of an integer.
5. integer - ANSWER A number, (positive, negative, or zero), that can be
represented without a fractional or a decimal component.
6. discrete - ANSWER A collection of numbers whose values are distinct,
separate, and unconnected.
7. prime factorization - ANSWER Determining the set of prime numbers
whose product is the original integer.
8. continuous - ANSWER A collection of numbers whose values are not
dividable into distinct units.
,9. expressions - ANSWER A string of terms that are connected by division,
addition, and subtraction operations.
10.trailing zeros - ANSWER Sequence of zeros after the last non-zero digit in
a decimal number.
11.proportion - ANSWER A true statement in which two ratios are equal to
each other.
12.butterfly method - ANSWER Cross-multiplication method used to
determine whether two fractions are equal. The numerator of one fraction is
multiplied by the denominator of the opposite fraction on both sides.
13.unit conversion - ANSWER A method used to change between
measurement systems.
14.terminal decimal - ANSWER A decimal number that has a finite number of
digits.
15.least common multiple (LCM) - ANSWER The smallest number in value
that is a multiple of two or more numbers.
16.rounding - ANSWER A method of estimating in order to make working
with a number easier.
17.reciprocal - ANSWER A reciprocal of a number is that number which,
when multiplied by the original number, equals 1. It is the same as the
multiplicative inverse.
,18.ratio - ANSWER Measures one quantity in relation to another quantity.
19.improper fraction - ANSWER A fraction where the the number in the
numerator is more than the number in the denominator.
20.cross multiplying - ANSWER A method used to prove that a proportion is
true.
21.constant - ANSWER A value that is known and unchanging.
22.y-intercept - ANSWER The y-value of the point at which a line intersects
with the y-axis.
23.distributive property - ANSWER A mathematical principle used to multiply
one term by multiple terms. This principle is employed when there are
parentheses around multiple terms, which are in turn multiplied by a single
term.
24.quadrants - ANSWER The four sections of the coordinate plane, separated
and defined by the x-axis and y-axis.
25.the substitution method - ANSWER When a variable is substituted by its
known value in an algebraic expression or equation.
26.slope - ANSWER The value that describes the direction and steepness of a
line drawn on the coordinate plane. It is measured by 'rise over run.'
Rise/Run = (the change in y value) / (the change in x value) = (y2 - y1)/(x2 -
x1)
, 27.arithmetic expression - ANSWER A string of numbers connected by
elementary operations.
28.coefficients - ANSWER A number by which a variable is multiplied. This
number is written in front of the variable(s).
29.algebraic equation - ANSWER Any equation that contains variables,
constants, or mathematical operations.
quotient - ANSWER The result of a division expression.
exponents - ANSWER Sometimes called a power, it is a quantity that represents
repeated multiplication.
factor - ANSWER An integer that divides another integer. We say an integer, x, is
a factor of another integer, y, if the quotient y/x is also equal to an integer.
composite number - ANSWER A number with more factors than just one and
itself. Not a prime number.
Fundamental Theorem of Arithmetic - ANSWER A concept which states that any
integer greater than 1 is either prime or is the product of a unique set of prime
numbers.
prime number - ANSWER A number with only two factors: one and itself.