C207 WGU Exam Questions with Correct Answers

C207 WGU Exam Questions with Correct Answers Ratio - ANSWER Continuous data with a unique zero point Interval - ANSWER Orders data at equal distance apart Ordinal - ANSWER Place qualitative objects in some kind of order Nominal - ANSWER Identify, group, or categorize What is the process of quality control? - ANSWER Reduce/minimize errors Out of range - ANSWER Outliers create this type of error Unpredictable error - ANSWER Random Error - No correlation Error may occur from missing data - ANSWER Omission error - distorted results blind study - ANSWER a study in which the subjects don't know if they are getting the treatment or the placebo Median - ANSWER Middle score for a set of data (if there is an even number, take two middle scores and average them) Z score - ANSWER The number of standard deviations a value (x) is above or below the mean set of numbers. z score formula - ANSWER take the x value and subtract the mean and then divide by the standard deviation If the average is the same for two groups, what will determine their difference? - ANSWER Variance (standard deviation) Mean - ANSWER Average