WGU C784 Applied Healthcare Statistics EXAM 2026 LATEST UPDATED QUESTIONS AND ANSWERS GRADED A+ Already passed!!

WGU C784 WGU C784 WGU C784 Applied Healthcare Statistics EXAM 2026 LATEST UPDATED QUESTIONS AND ANSWERS GRADED A+ Already passed!! A number that can be written as a ratio of integers, which means it can be written as a fraction. - -rational number The result of multiplying values. - -product A number whose value is 0 or greater and can be represented without a fractional or a decimal component. - -whole number The property that 0 can be added to any number without changing the value of the number. Likewise, 1 can be multiplied by any number without changing the value of that number. - -identity property The property that under certain operations in a multi-step expression, the computations may be done in any order. Commonly represented as (a + b) + c = a + (b + c). Addition and multiplication both have this property, but subtraction and division do not. - associative property The product of any integer with itself yields this. So, a number is this if it can be written as the square of an integer. For example, 9 is this because 3 * 3 = 9. Other examples are 16, 25, 36, 49,... - -perfect square In mathematics: a collection of numbers. - -set A set of rules that defines the order in which mathematical operations should be performed - -order of operations The number you must multiply x by to get 1. For example, 5 and 1/5. - -multiplicative inverse The positive square root of a number. - -principal square root A set of numbers between two specified values. - -interval WGU C784 WGU C784 A word or symbol (such as + or -) that indicates an operation between values. - operators The property that the order of the numbers under the operation does not change the result. Addition and multiplication have this property: a + b = b + a and ab = ba. - commutative The symbol which indicates to take the square root of the number that follows. - -radical sign Two numbers equidistant from 0 on a number line whose sum is 0. For example, 3 and 3. - -additive inverse The greatest number that is both a factor of a and a factor of b. - -greatest common factor (GCF) A graphical method used to identify the prime factorization of an integer. - -factor tree A number, (positive, negative, or zero), that can be represented without a fractional or a decimal component. - -integer A collection of numbers whose values are distinct, separate, and unconnected. - discrete Determining the set of prime numbers whose product is the original integer. - -prime factorization A collection of numbers whose values are not dividable into distinct units. - -continuous A string of terms that are connected by division, addition, and subtraction operations. - expressions The result of a division expression. - -quotient Sometimes called a power, it is a quantity that represents repeated multiplication. - exponents 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. - -factor A number with more factors than just one and itself. Not a prime number. - -composite number WGU C784 WGU C784 A concept which states that any integer greater than 1 is either prime or is the product of a unique set of prime numbers. - -Fundamental Theorem of Arithmetic A number with only two factors: one and itself. - -prime number Proportion that is equivalent to the given ratio but has a denominator of 100. - -percent proportion The number written after the slash, or below the fraction bar, in a fraction. - denominator A proportion where one part of a proportion is a variable, or unknown quantity. - conditional proportion The number that is written before the slash, or above the fraction bar, in a fraction. - numerator A fraction where the number in the numerator is less than the number in the denominator. - -proper fraction Sequence of zeros after the last non-zero digit in a decimal number. - -trailing zeros A true statement in which two ratios are equal to each other. - -proportion 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. - -butterfly method A method used to change between measurement systems. - -unit conversion A decimal number that has a finite number of digits. - -terminal decimal The smallest number in value that is a multiple of two or more numbers. - -least common multiple (LCM) A method of estimating in order to make working with a number easier. - -rounding 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. - -reciprocal Measures one quantity in relation to another quantity. - -ratio WGU C784 WGU C784 A fraction where the the number in the numerator is more than the number in the denominator. - -improper fraction A method used to prove that a proportion is true. - -cross multiplying A value that is known and unchanging. - -constant The y-value of the point at which a line intersects with the y-axis. - -y-intercept 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. - -distributive property The four sections of the coordinate plane, separated and defined by the x-axis and y axis. - -quadrants When a variable is substituted by its known value in an algebraic expression or equation. - -the substitution method 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) - -slope A string of numbers connected by elementary operations. - -arithmetic expression A number by which a variable is multiplied. This number is written in front of the variable(s). - -coefficients Any equation that contains variables, constants, or mathematical operations. - algebraic equation Addition, subtraction, multiplication, and division. - -elementary operation The vertical line that passes through the origin on a coordinate plane. - -y-axis Two mathematical expressions separated by the equals sign, =. The two expressions on either side of the equals sign hold the same value as one another. - -equation The point (0,0) on a coordinate plane, which is where the x-axis and y-axis intersect. - origin If you perform equivalent operations to both side of an equation, the result will always be an equivalent equation. - -the principle of equality WGU C784 WGU C784 A string of terms that are connected by division, addition, and subtraction operations. - algebraic expression A symbol that represents a mathematical value. - -variable A number or numerical worth. - -value The largest exponent in an expression. - -degree They that have the same variable(s) with the same exponent(s). These terms can be 'combined' using addition or subtraction. - -like terms Two numbers written in the form (x, y), where x represent the x-value or x-coordinate, and y represents the y-value or y-coordinate. - -ordered pairs A line that runs left to right on the coordinate plane, parallel to the x-axis. It has no 'rise' or change in y-value. - -horizontal line The horizontal line that passes through the origin on a coordinate plane. - -x-axis An individual number, a variable, or numbers and variables multiplied together. They are separated by addition, +, or subtraction, -, in an expression. - -term A common format that a linear equation can take that is helpful for graphing purposes. It is of the form y = mx + b, where m is the slope of the line and b is the y-intercept. - slope-intercept form A line that runs up and down on the coordinate plane, parallel to the y-axis. It has no 'run' or change in x-value. - -vertical line Two operations that undo one another. - -inverse operations A set of rules that defines the order in which mathematical operations should be performed. - -Order of Operations An expression or equation of degree 3. - -cubic An expression or equation of degree 2. - -quadratic Sometimes called a power, it is a quantity that represents repeated multiplication. - exponent WGU C784 WGU C784 They that do not have the same variable(s) with the same exponent(s). These terms can not be combined using addition or subtraction. - -unlike terms An expression or equation of degree 1. - -linear Non-numeric information based on some quality or characteristic. - -qualitative data The most frequent value in a dataset. - -mode A graphical display that shows data in categories as percentages of a circle. - -pie chart Data values that are numbers, representing quantities that can be counted or measured. - -quantitative data The difference, in value, between the bottom and top 25 percent of the sample or population. - -interquartile range The minimum, first quartile, median, third quartile, and maximum. A box plot represents the five numbers in a five-number summary. - -five-number summary A visual representation of data in which individual data points are plotted to the right of a horizontal line, or chart, and the left shows the interval categories. - -stem plot An arrangement of values that illustrates their frequency or occurrence. - -distribution The science that deals with the interpretation of numerical facts or data through theories of probability. Also, the numerical facts or data themselves. - -statistics 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 set's distribution. There are three main measures: mean, median, or mode. - -measure of central tendency An observation point that is significantly distant from the other observations in the dataset. - -outlier A graph that displays data that is distributed over groups or categories. - -bar chart A set of data having one mode. - -unimodal One of three measures that describe what is "normal" in a data set: mean, median, or mode. - -center WGU C784 WGU C784 A graph that displays continuous data in vertical bars that represent intervals of data. - histogram The difference between the maximum and minimum values. - -range A graphical representation of data that plots the frequency of data along a horizontal line. - -dot plot 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. - -skewness The relationship between units and their visual representation on a graph. - -scale The value or quantity lying at the midpoint of a frequency distribution. - -median Average, calculated by adding a series of elements in a data set together and dividing by the total number in the series. - -mean Values that divide a data set into four equally sized groups. - -quartile A distribution that is not symmetrical but has a greater quantity of data on one side of the mean. - -skewed distribution The quality of the data having the same shape on both sides of the mean. - -symmetry A common type of distribution of data points that forms a bell shaped, symmetrical curve around the mean. - -normal distribution A graphical rendering of the range and the first and third quartiles of a data set with the data set's median in the center. - -box plots A number used to describe a specific characteristic about a data set. - -numerical summary Any collection of numerical values, such as measurements, observations, or survey responses. - -data set A standard proportion or percentage of data points that lie away from the mean for a normal distribution. - -the Standard Deviation Rule A skewed distribution where the long tail of the curve is on the negative side of the peak. - -skewed left WGU C784 WGU C784 The measure on average of how far the data points are from the mean. - -standard deviation A description of a data set that has more than two modes. - -multimodal A record of the number of times data occurs within a certain category. - -frequency distribution A skewed distribution where the long tail of the curve is on the positive side of the peak. - -skewed right This type of data, also called qualitative data, consists of data values that can be sorted into groups or categories. - -categorical data A set of data having two modes. - -bimodal As one variable increases, the other variable decreases. - -negative correlation A way to approximate a percentage by dividing the number of times an event occurred in an experiment by the total number of trials. - -relative frequency A tool used for graphing that is a display of a two-dimensional plane. It consists of an x axis and a y-axis; the x-axis being a horizontal number line, the y-axis is a vertical number line, and the axes meet at the origin (0, 0). - -coordinate plane A table that contains frequency counts for two categorical variables. - -contingency table or two-way frequency table There is no apparent overall trend between the two variables. - -no correlation The variable that represents the result. - -response variable An observation point that is significantly distant from the other observations in the dataset. - -outlier An expression or equation of degree 1. - -linear The minimum, first quartile, median, third quartile, and the maximum. A box plot represents the five numbers in a five-number summary. - -five-number summary Two numbers written in the form (x,y), where x represents the x-value or x-coordinate, and y represents the y-value or y-coordinate. - -ordered pair WGU C784 WGU C784 A graphical rendering of the range and the first and third quartiles of a data set with the data set's median in the center. - -box plot A graph that uses dots on a coordinate plane to show the relationship between variables. - -scatterplot The frequency counts in each cell of the table. - -joint frequencies The totals of each row and column in a table; given this name because they are in the 'margins' of the table. - -marginal frequencies A pattern of two events occurring around the same time. This pattern can be coincidental, and happen by chance, or causal, when one event causes the other event to occur. - -correlation The variable that may be the cause of some result. - -explanatory variable As one variable increases, the other variable also increases. - -positive correlation An expression or equation that is illustrated by something other than a straight line. - non-linear A way to approximate a percentage by dividing the number of times an event occurred in an experiment by the total number of respondents in that row or column. See relative frequency. - -conditional percentages Several points are grouped together away from the majority of points in a data set. - cluster A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. - -lurking variable The probability of rejecting the null hypothesis when it is true. - -significance level A counterintuitive situation in which a trend in different groups of data disappears or reverses when the groups are combined. - -Simpson's Paradox The largest exponent in a mathematical expression or equation. - -degree A relationship of cause and effect between two or more variables. - -causation Estimation using the linear regression equation is between known data points. - -linear interpolation WGU C784 WGU C784 An entire pool from which a sample is drawn. - -population Using information from a data set to make predictions about data outside of the original set. - -extrapolate A number between -1 and 1 that indicates the relationship between the data and the regression line. A value of 1 or -1 indicates a perfect correlation and all the data lie on the positive or negatively sloped line. - -correlation coefficient A pattern or relationship between two variables. - -association A linear relationship between two variables. This relationship can be either positive or negative. - -correlation A tool for graphing consisting of a horizontal x-axis and a vertical y-axis. - -coordinate plane A statistical test that tell us whether a result is significant. - -hypothesis test The presumption that a given result or relationship is likely caused by more than just random chance. - -statistically significant An equation used to model the relationship between two quantitative dependent and independent variables. - -regression equation A graph that uses dots on a coordinate plane to show the relationship between variables. - -scatterplot A number whose value is one less than the sample size, when conducting a hypothesis test. - -degrees of freedom A technique for finding the regression line. - -least squares A common format for the equation of a line: y = mx + b, where m is the slope and b is the y-intercept. - -slope-intercept form The line of best fit to show the relationship between variables, the one that minimizes distance from each data point to the line. - -regression line A measurable difference between two groups or samples that reflects a real difference, rather than the difference being by chance. - -significant difference WGU C784 WGU C784 The probability that a result was caused by chance. - -p-value A linear relationship between two variables in which the dependent variable increases as the independent variable decreases. - -negative correlation A linear relationship between two variables in which the dependent variable increases as the independent variable increases. - -positive correlation A diagram that records all the events in a sample space by attaching each new set of events to each branch of the earlier events. The number of outermost branches gives the sample size. - -tree diagram The number of different outcomes for an experiment. - -sample size A procedure that can be done repeatedly which has a well defined set of outcomes. - experiment A type of chart that illustrates how distinct sets, topics, or objects relate to one another. Uses circles to represent events. - -Venn diagram A fundamental principle of probability which states that the product of all branches of a probability tree, added together equals 1. - -law of total probability A table which records the frequency of instances in different categories. It can be used to determine if the categories are dependent or independent. - -frequency table The entire set of outcomes for a trial or experiment. - -sample space Also called the Actual, Exact, or Classical Probability, it is computed by dividing the number of outcomes where the desired event occurs by the total number of outcomes. Note that the outcomes must be equally likely. - -theoretical probability The chance of an event occurring. - -probability The small quantity of data gathered about a population that will represent the population as a whole. - -sample An experiment in which all outcomes are equally likely. - -fair Events, where the occurrence of one does not affect the probability that the other event(s) will occur. - -independent events WGU C784 Experiment in which the outcome is not known ahead of time and in which results do not affect future outcomes. - -random experiment If two events are independent, then P(A and B) = P(A) x P(B). - -multiplication rule for independent events Two events which cannot both occur at the same time. - -disjoint A way to approximate a probability by taking the number of times an event occurs divided by the total number of trials. - -relative frequency An entire pool from which a sample is drawn. - -population An event that is the opposite of another event. - -complement As the number of trials increases the empirical probability converges on the theoretical probability, that is the estimate of the true probability becomes more accurate. - -the law of large numbers Two events for which the occurrence of the first affects the probability of the second. - dependent events A probability that depends on the occurrence of an earlier event. - -condtional probability An estimation of probability derived from recording data about what has happened during a series of experiments. - -empirical probability WGU C784