Applied Healthcare Statistics – WGU Questions & Answers

The fact that we can add the same number to both sides of an equation, and the result will be an equivalent equation. - ANSWERSaddition principle of equality Used to determine the probability that at least one of two events will occur. P(A or B) = P(A) + P(B) - P(AB) - ANSWERSAddition Rule of Probability Two integers that are opposites. The sum of an integer and its additive inverse is zero. (-3, 0, and 3) - ANSWERSadditive inverse A pattern or relationship between two variables. - ANSWERSassociation A graph that displays data that is distributed over groups or categories. - ANSWERSbar chart a data set which has two modes/peaks in the graph - ANSWERSbimodal A graph that displays the highest and lowest quarters of data on each end of the box, the middle two quarters of the data as a box, and the median - ANSWERSbox plot Also called Qualitative data. Data that consists of names, labels, or other nonnumerical values - ANSWERScategorical data a relationship between two variables: cause and effect - ANSWERScasual relationship a number multiplied by a variable. - ANSWERScoefficient when you simplify an algebraic expression - ANSWERScombining like terms A number with more than two factors - ANSWERScomposite number a way to approximate percentage by dividing the number of times an event occurred in an experiment by the total number of experiments/ relative frequency - ANSWERSconditional percentage A contingency table displays counts and, sometimes, percentages of individuals falling into named categories on two or more variables. - ANSWERScontingency table an observed relationship between two quantitative variables. - ANSWERScorrelation the sum of probabilities. the chance that a randomly selected score will be less than or equal to a specified value. - ANSWERSCumulative Property n-1 (any # minus 1) - ANSWERSdegrees of freedom Two or more events in which the outcome of one event affects the outcome of the other event(s). - ANSWERSdependent events a collection of numbers whose values are distinct, separate and unconnected - ANSWERSdiscrete data two events that have no outcomes in common - ANSWERSdisjoint a graphical display of data using dots - ANSWERSdot plot a set with no elements - ANSWERSempty set based on observations obtained from probability experiments - ANSWERSempirical probability Fractions that have the same value - ANSWERSequivalent fractions minimum, 1st quartile, median, 3rd quartile, maximum - ANSWERSfive-number summary a record of the number of ties data occurs within a certain category - ANSWERSfrequency distribution a bar graph depicting a frequency distribution - ANSWERShistogram a) the sum of a number and 0 is the number; b) the product of a number and 1 is the number - ANSWERSidentity property a fraction whose numerator is larger than the denominator - ANSWERSimproper fraction the difference between the first and third quartiles - ANSWERSInterquartile Range (IQR) Frequencies for each cell in a two-way table relative to the total number of data. - ANSWERSjoint frequencies (statistics) law stating that a large number of items taken at random from a population will (on the average) have the population statistics - ANSWERSlaw of large numbers sum of the product of all sequences of possible outcomes in a sample space is 1. probability tree: multiply each branch, then sum the products to get to 1. - ANSWERSlaw of total probability the least common multiple of the denominators - ANSWERSleast common denominator (LCD) The smallest multiple that two or more numbers have in common - ANSWERSleast common multiple a technique for finding the regression line - ANSWERSleast squares straight line - ANSWERSLinear the use of a linear equation to predict values that are outside the range of data - ANSWERSlinear extrapolation the use of a linear equation to predict values that are inside of the data range - ANSWERSlinear interpolation Row totals and column totals in a two-way table. - ANSWERSmarginal frequencies average - ANSWERSmean mean, median, mode - ANSWERSmeasure of central tendencies Range, Interquartile Range, Standard Deviation - ANSWERSmeasures of spread the middle score in a distribution; half the scores are above it and half are below it - ANSWERSmedian The value that occurs most frequently in a given data set. - ANSWERSmode distributions with more than two modes - ANSWERSmultimodal P(A and B) = P(A) x P(B) - ANSWERSmultiplication rule for independent events