WGU C784 Applied Healthcare Statistics Objective Assessment Test 2026 Approved with Solutions

WGU C784 Applied Healthcare Statistics Objective Assessment Test 2026 Approved with Solutions Given the following set of numbers: 3.3, -2.3, -16, 25. What are the square roots of the whole number? A. +/- 2.3 B. +/- 3.3 C. +/- 4 D. +/- 5 - -D. +/- 5 Composite Number - -A number with more factors that just one and itself. Equivalent Fractions - -Different fractions that represent the same value. X-Axis - -The horizontal line that passes through the origin on a coordinate plane. Qualitative Data - -Non-numeric information based on some quality or characteristic. No Correlation - -There is no apparent overall trend between the two variables. If the correlation coefficient is 0, this only rules out a linear trend. There could be a non-linear or curvilinear trend. Extrapolate - -Using information from a data set to make predictions about data outside of the original set. Event - -An outcome, or set of outcomes, whose chance of occurrence can be represented with a probability. Given the following set of numbers: 10, 2.5, -4, -4.5, 5. What is the sum when adding together only the whole numbers? A. 5.5 B. 11 C. 12.5 D. 15 - -D. 15 Operation - -In Mathematics, an operation is a procedure, which generates a new value from one or more operands, or Mathematical values. WGU C784 WGU C784 Conditional Proportion - -A proportion where one part of the proportion is a variable, or unknown quantity. Coefficients - -A number by which a number is multiplied. This number is written in front of the variable(s). Mean - -Average, calculated by adding a series of elements in a data set together and dividing by the total number in the series. Outlier - -An observation point that is statistically distant from the other observations in the dataset. Regression Line - -The line of best fit to show the relationship between variables, the one that minimizes distance from each data point to the line. Experiment - -A procedure that can be done repeatedly which has a well defined set of outcomes. Given the following expression: 4 + 7 × (6 - 3)2. What is the answer using proper order of operations? A. 25 B. 46 C. 67 D. 99 - -C. 67 Multi-Step Expression - -An expression or equation with more than two values and two or more operators that requires multiple steps to be solved. Improper Fraction - -A fraction where the number in the numerator is more than the number in the denominator. Y-Intercept - -The y-value of the point at which a line intersects with the y-axis. Check Sheet - -A structured form or table that allows data to be collected by marking how often an event has occurred in an certain interval. Linear - -An expression or equation of degree 1. Least Squares - -A technique for finding the regression line. Sample Size - -The number of different outcomes for an experiment. WGU C784 WGU C784 Given the following expression: 5 x (30 - 27)2 + 4. What is the correct answer using the proper order of operations? A. 34 B. 49 C. 65 D. 81 - -B. 49 Exponents - -Sometimes called a power, it is a quantity that represents repeated multiplication. Least Common Multiple (LCM) - -The smallest number in value that is a multiple of two or more numbers. Order of Operations - -A set of rules that defines the order in which Mathematical operations should be performed. Numerical Summary - -A number used to describe a specific characteristic about a data set. Joint Frequencies - -The frequency counts in each cell of the table. Linear Extrapolation - -Estimation using the linear regression equation is made outside known data points. Fair - -An experiment in which all outcomes are equally likely. What is the greatest common factor of 132 and the square root of 121 using prime factorization? A. 1 B. 2 C. 10 D. 11 - -D. 11 Continuous - -A collection of numbers whose values are not dividable into distinct values. Proper Fraction - -A fraction where the number in the numerator is less than the number in the denominator. Unlike Terms - -Terms that do not have the same variable(s) with the same exponent(s). These terms can not be combined using addition or subtraction. WGU C784 WGU C784 Valid Data - -Data that results from a test that accurately measures what it was intended to measure. Five-Number Summary - -The minimum, first quartile, median, third quartile, and the maximum. A box plot represents the five numbers in a five-number summary. Observational Study - -The researcher observes if there is an association between variables. There is no treatment or control group. Conditional Probability - -A probability that depends on the occurrence of an earlier event. What is the greatest common factor of 24 and 84 using prime factorization? A. 2 B. 4 C. 8 D. 12 - -D. 12 Negative Number - -A number whose value is less than zero. On the number line, negative numbers are to the left of zero. Numerator - -The number that is written before the slash, or above the fraction bar, in a fraction. Slope - -The number 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). Statistics - -The science that deals with the interpretation of numerical facts or data through theories of probability. Also, the numerical facts or data themselves. Conditional Percentages - -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. Hypothesis Test - -A statistical test that tells us whether a result is significant. Disjoint - -Two events which both cannot occur at the same time. What is 3/14 - 1/7? A. 1/14 B. 2/7 C. 5/14 WGU C784 WGU C784 D. 3/2 - -A. 1/14 Whole Number - -A number whose value is 0 or greater (negative number are not considered whole numbers) and can be represented without a fractional or decimal component. Cross Multiplying - -A method used to prove that a proportion is true. Addition Principle of Equality - -The fact that we can add the same number to both sides of an equation, and the result will be an equivalent equation. Dot Plot - -A graphical representation of data that plots the frequency of data along a horizontal line. Independent Variable - -The variable that may be the cause of some result, or is presented as the variable that offers an explanation. Also called an explanatory variable. Regression Equation - -An equation used to model the relationship between the response and explanatory variables in a regression. Tree Diagram - -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. What is 2/3 + 1/4? A. 11/12 B. 3/12 C. 3/7 D. 8/3 - -A. 11/12 Positive Number - -A number whose value is greater than zero. On the number line, positive numbers are to the right of zero. Rate - -A ratio that compares two quantities having different units of measure. Quadrants - -The four sections of the coordinate plane, separated and defined by the x axis and y-axis. Minimum - -The smallest value in a set. Non-Linear - -An expression or equation that is illustrated by something other than a straight line. WGU C784 WGU C784 Linear Interpolation - -Estimation using the linear regression equation in between known data points. Sample Space - -The entire set of outcomes for a trial or experiment. A patient's protein intake for today has been 15.76g, 8.49g, and 22.58g. What is the total protein intake rounded to the nearest tenth of a decimal? A. 46.5g B. 46.8g C. 46.9g D. 47g - -B. 46.8g Square Root - -A number that produces a specified number when it is multiplied by itself. Rounding - -A method of estimating in order to make working with a number easier. Term - -In Mathematics, a term is an individual number or variable, or numbers and variables multiplied together in an expression. Terms are separated by addition or subtraction signs. Stem Plot - -A visual representation of data in which individual points are plotted to the right of a vertical line, or chart, and the left (the "stem") shows the interval categories. Scatterplot - -A graph that uses dots on a coordinate plane to show the relationship between two quantitative variables. Population - -An entire pool from which a sample is drawn. Multiplication Rule for Independent Events - -If two events are independent, then P(A and B) = P(A) x P(B). Given the equation: (.5475 - .3025) x .15. What is the solution rounded to the nearest thousandth? A. .03675 B. .0368 C. .368 D. .037 - -D. .037 Rational Number - -A rational number is a number that can be written as a ratio of integers, which means it can be written as a fraction. WGU C784 WGU C784 Percent Sign - -A symbol used to denote percentages. Horizontal Line - -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. Interquartile Range - -The difference, in value, between the bottom and top 25 percent of the sample or population. 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 the center. Control Group - -In an experimental study, this group does not receive treatment or receives a placebo. Venn Diagram - -A type of chart that illustrates distinct sets, topics, or objects relate to one another. Uses circles to represent events. An intravenous drip is infused at a rate of 4.5 milliliters per minute. How many milliliters are infused per hour? A. .075mL B. 2.7mL C. 75mL D. 270mL - -D. 270mL Base Number - -The number multiplied by itself when paired with an exponent. For example, in 8 to the third power (8^3), 8 would be the base number. Trailing Zeros - -Sequence of zeros after the last non-zero digit in a decimal number. Equation - -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. 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. Causal Relationship - -A relationship between two variables that can be classified as cause-and-effect. Random Experiment - -Experiment in which the outcome is not known ahead of time and in which results do not affect future outcomes. WGU C784 WGU C784 A patient's medication was increased by 40 milligrams. What is the percent increase in the medication if the original medication was 180 milligrams? A. 2.2% B. 4.5% C. 22.2% D. 45% - -C. 22.2% Factorization - -The process of determining the prime factors of a composite number. Unit Multiplier - -A fraction that contains two equivalent quantities but in two different units, used in order to convert units. Division Principle of Equality - -If both sides of the equation are divided by the same non-zero number, the result is an equivalent equation. Symmetry - -The quality of the data having the same shape on both sides of the mean. Contingency Table - -A table that contains frequency counts for two categorical variables. Also see Two-Way Frequency Table. Correlation - -An observed relationship between two quantitative variables. While this is most commonly a linear relationship, it does not need to be. Not that observing a relationship does NOT imply that there is a meaningful causal link between the variables. Sample - -The small quantity of data gathered about a population that will represent the population as a whole. What is the Fahrenheit equivalent for a patient's room that needs to be kept at 25 degrees Celsius? A. 70° B. 75° C. 77° D. 80° - -C. 77° Multiplicative Inverse - -The multiplicative inverse of a number x is the number you must multiply x by to get 1. For example, 5 and 1/5 are multiplicative inverses. Terminal Decimal - -A decimal number that has a finite number of digits. Slope-Intercept Form - -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.