WGU C955 Applied Probability and Statistics, WGU C955, Probability and Statistics, WGU C955 Exam Study Guide

Discrete data - Has distinct values, can be counted, had unconnected points (think dots) Continuous data - Has values within a range, measured not counted, does not have gaps between data points (data is connected lines or curves). Example of discrete data - Days of the week Expressions - A group of symbols such as numbers and operators that has mathematical validity Commutative - The order in which the numbers appear in the sum can be reversed Identity property - Adding 0 to any number does not change the original number Additive inverse - Values that are equally far from 0 on the number line. Negative - When multiplying a positive number by a negative number the result is always Positive - Multiplying a negative number by a negative number results in a positive Factors - Integers that evenly divide the initial integerPrime number - Positive integer with exactly two positive factors consisting of 1 and itself Composite number - Has at least one positive factor other than one and itself Factorization - Process of breaking up a composite number into its prime factors fundamental theorem of arithmetic - Any integer greater than one is either Prime or the product of Prime numbers Principal square root - Positive square root of a number Radican - Number under radical sign √16=4 Open Circle - Represents less than or greatest than on the number line Perfect square - Product of any integer with itself yields a perfect square. Whole numbers - positive numbers with a whole value Integers - Numbers with no fractions or decimal value but can be positive or negative Rational numbers - Numbers that can be expressed as a fraction or decimal values that have that end or repeat forever. Includes all integers since all integers can be expressed as fractions.