C207 OA Exam Questions With 100% Solved Correct Answers A+ Pass

C207 OA Exam Questions With 100% Solved Correct Answers A+ Pass Prescriptive Analytics - Answers - use techniques that create models indicating the best decision to make or course of action to take 4 components of Big Data - Answers - Structured and Unstructured data, large quantities, cannot use traditional software and databases Data Mining - Answers - finding hidden patterns within Big Data Descriptive Analytics - Answers - the use of data to understand past and current business performance and make informed decisions Predictive Analytics - Answers - the use of past data to model future outcomes 3 Steps of Davenport-Kim Three-Stage Model - Answers - 1. framing the problem 2. solving the problem 3. communicating results Data Management - Answers - A process that focuses on data collection, storage, and retrieval. Common data management functions include addition, deletion, modification, and listing. Continuous Data - Answers - Data that can be any value on a range ex: age Interval Data - Answers - Data that is within a range and an equal interval apart ex: times, shoe sizes Ratio Data - Answers - Data that have known intervals between values and a meaningful zero value ex: income, inventory levels Ratioooo = 0 Discrete Data - Answers - Numerical data that can be counted as whole numbers ex: cars Nominal Data - Answers - Data which consists of names, labels, or categories ex: male/female NOMinal = NAMes Ordinal Data - Answers - Data that places objects into an order according to some quality with higher order indicating more of that quality ex: degrees ORDinal = ORDered Random Error - Answers - An error that will not repeat itself and occurs less in larger samples of data Systematic Error - Answers - An error that is consistently made throughout an experiment, likely because of measurement or tool faultiness Omission Error - Answers - An error because something (for example, data or survey response) is missing. Outlier - Answers - A value much greater or much less than the others in a data set Measurement Bias - Answers - Bias from a poor representation of the population or a sample that is not random Response Bias - Answers - Tendency for subjects to respond with what they assume the questioner wants to hear Conscious Bias - Answers - Tendency for the surveyor to be seeking or leading to a certain response Skewness (Bias) - Answers - Measure of degree to which data "leans" toward one side Observational Studies - Answers - Studies in which the researcher observes and statistically analyzes when it is impractical to have control Experimental Studies - Answers - Studies in which the independent variables are directly manipulated and the effects on the dependent variable are examined Independent Variable - Answers - The experimental factor that is manipulated by researcher, aka the predictor Dependent Variable - Answers - The outcome factor; the variable that may change in response to manipulations of the independent variable. Blind Study - Answers - Participants are not told whether they're in the control or experiment group Double Blind Study - Answers - Participants and researchers are not told which group is control or experiment Triple Blind Study - Answers - Participants, experimenters, independent raters of outcome, and data managers are unaware of who is control or experiment Qualitative Data - Answers - Information describing color, odor, shape, or some other physical characteristic Quantitative Data - Answers - Data associated with mathematical models and statistical numbers Probability - Answers - The chance of an event occurring in the future Independent Events - Answers - Events which the outcomes have no effect on each others occurrence Complementary Events - Answers - Only select possible outcomes ex: coin flip landing heads/tails Conditional Probability - Answers - the probability that one event happens given that another event is already known to have happened