WGU C784 - APPLIED HEALTHCARE STATISTICS OBJECTIVE ASSESSMENT #1| 100 QUESTIONS AND ANSWERS

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. 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. 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. 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 D. 3/2 A. 1/14