WGU C207 STUDY GUIDE MODULE 5 & 6 | 73 QUESTIONS WITH 199 % CORRECT ANSWERS | VERIFIED

incidence rate - would be used if we want to measure the proportion of health workers who acquire Ebola from working with Ebola patients percentile - indicates the percent of the population that falls below a certain value standard score - for a particular data point, represents the distance from the mean in terms of standard deviations Analysis of variance (ANOVA) - is used to determine if three or more sample means are statistically not all equal norm reference test - is a test that compares an individual to other individuals on the bell-shaped curve criterion referenced test - compares an individual to certain defined standards observed score - is the score actually achieved by an individual on a test. true score - is the average score an individual would achieve if he or she were to take the test infinite times random measurement error - can eventually be eliminated over time as the number of tests increases (according to Classic Test Theory) systematic measurement error - occurs when something that is entirely unrelated to the test is affecting test scores item response theory - takes into account that different questions may have different levels of difficultyreliability index - measures how well a person's observed score on a test represents that person's true score test retest method - applies when the same test is given to the same sample on two different occasions parallel forms method - applies when two versions of a test are given at the same time to each of half of a sample of students