Author: Christine Farr


Question 1 of 25 4.0 PointsCross-sectional data are data: A.collected over timeB.that are collected over a single period of time C.consisting of a single variableD.consisting of two or more variablesQuestion 2 of 25 4.0 PointsOrdinal data are: A.sorted into categories according to specified characteristicsB.ordered or ranked according to some relationship to one anotherC.ordered, have a specified measure of a distance between observations but have no nature zero D.data which have a natural zeroQuestion 3 of 25 4.0 PointsThe process of collection, organization, and description of data is commonly called: A.descriptive statistics B.statistical inferenceC.predictive statisticsD.operational statistics Question 4 of 25 4.0 Points__________ is a measure of a linear relationship between two variables, X and Y. A.correlationB.rangeC.standard deviation D.medianQuestion 5 of 25 4.0 PointsThe statistical measures that characterize dispersion are: A.Range, variance, standard deviationB.Mean, median, modeC.Range, mean, standard deviationD.Correlation, frequencies, standard deviation Question 6 of 25 4.0 PointsDefine standard deviation A.A measure of how dispersed observations around the mean B.The square root of varianceC.The amount of variation error in the dataD.A & B aboveQuestion 7 of 25 4.0 PointsA discrete random variable is: A.outcomes over a continuous range of real numbers B.a numerical description of the outcome of an experiment C.one for which the number of possible outcomes can be countedD.one for which the number of possible outcomes can not be counted Question 8 of 25 4.0 PointsDefine probability distributions. Describe two common probability distributions.Question 9 of 25 4.0 PointsA confidence interval (CI) is a range of scores with specific boundaries that should contain the ______ mean. A.sampleB.populationC.standard errorD.none of the above Question 10 of 25 4.0 PointsThe most common probabilistic sampling approach is: A.simple random sampling B.convenient samplingC.complex samplingD.error sampling

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Introduction to Psychology

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