Elementary Statisticsparameter ratiofrequency table meanUnit 1 ReviewAdditional Classroom informationHistograms are the most common visual display.Elementary StatisticsUnit 1 ReviewStudents should be able to define or answer questions about the following.General Levels of Measurementstatistics (general) nominalpopulation ordinalsample intervalparameter ratiostatisticqualitative data Samplingquantitative datacontinuous data conveniencediscrete data randomdescriptive statistics stratifiedinferential statistics systematicclusterGraphs and Charts Measures of Central Tendencyfrequency table meanrelative frequency table median line graph modehistogrambox-and-whisker plotpie chart Measures of PositionquartilepercentileMeasures of Variation Skewnessrange symmetric (none)variance right (positive)standard deviation left (negative)coefficient of variationElementary Statistics Page 2Unit 1 ReviewAdditional Classroom informationHistograms are the most common visual display. are the easiest to interpret.become confusing when displaying many variables.can be used at any level of measurement.Line graphs are used for continuous data.are used at the interval or ratio level of measurement.emphasize increases or decreases.are use for multiple comparisons.Pie charts are used at the nominal level.Box Plots are used for multiple comparisons.need some explanation of how to interpret.Mean is appropriate at the interval or ratio level of measurement.is greater than the median in a skewed right distribution.is less than the median in a skewed left distribution.is not appropriate when outliers existis the most common measure of central tendencyMedian is appropriate at the ordinal, interval, and ratio level of measurement.is equal to the 50th percentile.is not sensitive to outliersMode is appropriate at any level of measurement.is usually not an accurate measure of central tendency.should only be used at the nominal level.Range is easy to understandis influenced by outliersuses only two data values to computeVariance takes every data value into accountis not commonly used as a descriptive measure of variabilityStandard is the square root of the varianceDeviation is the most common descriptive measure of variabilityis not easily understood by the general