WGU C784 Applied Healthcare Statistics Practice Study Exam 2026

WGU C784 Applied Healthcare Statistics Practice Study Exam 2026 Whole numbers - -Numbers that do not contain decimals or fractions Integers - -Whole numbers and their opposites Rational numbers - -All positive and negative integers, fractions and decimal numbers. Real numbers - -Any number that can be placed on a number line. Including numbers that do not end, and number like pi A Set - -A collection of numbers Discrete - -Values that are distinct, separate and unconnected Continuous - -Values in a set that are connected, without gaps Quantitative Data - -Consists of data values that are numerical, representing qualities that can be counted or measured Categorical data - -Also called qualitative data. Consists of data that are groups, such as names or labels, and are not necessarily numerical. Graphical displays - -Visual displays of data sets Data set - -Any collection of numeric values, such as measurements, observations, or survey responses Distribution - -An arrangement of values that illustrates their frequency or occurrence Pie chart - -A graphical display that shows data in categories as percentages of a circle Bar chart - -A graph that displays data that is distributed over groups or categories Relative frequency - -A way to approximate a percentage by dividing the number of times an event occurred in an experiment by the total number of trials. Frequency distribution - -A record of the number of times data occurs within a certain category WGU C784 WGU C784 Dot plot - -A graphical representation of data that plots the frequency of data along a horizontal line Outliers - -An observation point (number) that is significantly distant from the other observations in the dataset Stem plots - -A visual representation of data in which individuals data points are plotted to the right of a horizontal line, or chart, and the left (the "stem") shows the interval categories Box plot - -A graphical rendering of the range and the first and third quartiles of a data set with the data set's median in between Measure of central tendency - -A summary measure that is used to describe an entire set of data with one value that represents the middle or center of the data sets distribution. There are 3 main measures: mean, median or mode Histogram - -A graph that displays data through vertical bars that show the counts or numbers in each range Shape - -The outline of a set of data displayed on the coordinate axes Scale - -The relationship between units and their visual representation on a graph Check sheet - -A structured form or table that allows data to be collected by marking how often an event has occurred in a certain interval Guides for histogram - - 50 divide data into 5-7 intervals 50-100 divide into 6-10 intervals 100-250 divide into 7-12 intervals 250 divide into 10-20 intervals Symmetry - -The quality of the data having the same shape on both sides of the mean Normal distribution - -A comment type of distribution of data points that for a a bell shaped, symmetrical curve around the mean Skewed distribution - -A distribution that is not symmetrical but has a greater quantity of data on one side of the mean Skewness - -A measure of the degree to which a probability distribution "leans" toward one side of the average, where the median and mean are not the same Negatively skewed - -A distribution where the rail on the left of the curve is longer, indication theta more values are the less than the central or most common value WGU C784 WGU C784 Positively skewed - -A distribution where the tail on the right of the curve is longer, indicating that more values are more than the central or most common value Bimodal - -A description of a data set that has two modes Multimodal - -A description of a data set with 2 or more modes Statistics - -The science that deals with the interpretation of numerical facts or data through theories of probability Reliable data - -Data is both consistent and repeatable Valid data - -Data that results from a test that accurately measures what it was intended to measure Addition - -Finding the total of 2 or more values Subtraction - -Taking one or more value away from another Expression - -A string of terms that are connected by division, addition and subtraction operations Operator - -A word or symbol that indicates an operation between values Sum - -The result of multiple number being added together Commutative - -The property that the order of the numbers under the operation does not change the result. Addition and multiplication are commutative: A plus B equals B+ a and a B equals BA Identity property - -The property that zero can be added to any number without changing the value of the number. Likewise, one can be multiplied by any number without changing the value of that number. Additive inverse - -Two numbers equidistant from zero on a number line whose sum is zero. Three and -3 are additive inverse is Difference - -The result of one number being subtracted from another number. Multistep expression - -And expression With more than two values and two or more operations that requires multiple steps to be solved Product - -The result of multiplying values. Multiplication inverse - -The multiplication inverse of a number X is the number you must multiply X back to get one. For example 5 and 1/5 are multiplication inverses WGU C784 WGU C784 Quotient - -The result of a division expression Negative numbers - -I never whose value is less than zero. On the number line negative numbers are to the left of zero Exponent - -Sometimes called a power, it is a number that shows how many times the bass is multiplied by self. For example, in eight to the third, at three would be the exponent Superscript - -A symbol, such as a number or letter, written above And immediately to the left or right of another character Base number - -The number multiplied by itself when paired with an exponent. For example, in eight to the third, it would be the best number. Sampling - -The process of selecting research participants or survey respondents from a population. Probability - -The likelihood of an event occurring. Order of operations - -PEMDAS- Parentheses exponents multiplication and division, addition and subtraction Associative - -The associative property holds the end or start an operations any multi step expression, the computations maybe done in any order. Estimation - -Approximating a value for a calculation Factor - -An integer that evenly divided a larger number Prime number - -An integer with an absolute value greater than one that has only two positive factors one and itself. Examples are 2, 3 and 5 Factorization - -The process of finding the prime factors of a composite number Fundamental theorem of arithmetic - -A concept which states that an integergreater than one is either prime, or is the product of a unique set of prime numbers. Prime factorization - -Determining the set of prime numbers his product is the original integer. Factor tree - -A graphical method used to identify the prime factorization of an integer Greatest common factor, GCF - - WGU C784 Composite number - -An integer that has factors other than itself. In other w