# Psyc312-8

 For which scales can a mean be calculated NominalIntervalRatio For which scales can a median be calculated OrdinalIntervalRatio For which scales can a mode be calculated? NominalOrdinalIntervalRatio Advantages & Disadvantages of using the mean easily manipulated algebraicallyreliable because it takes into account every measure of a data set greatly affected by extreme scores Advantages & Disadvantages of Median little influence by extreme scoresreasonable estimate of the center of a distribution may not be good to ignore extreme values Advantages & Disadvantages of Mode not influenced by extreme scores may not represent the scoresignores extreme values completely How to calculate IQR? Find the median location (n+1)/2Find quartile location (ML+1)/2Find Q1 & Q3 (low score + QL; high - QL)IQR= distance btwn Q3 - Q1Outliers: Q3+ (1.5 x IQR); Q1-(1.5 x IQR) Empirical Rule... 68-95-99.7 within 3 standard deviations of the mean Deviation the difference btwn each score and the mean of the data set Variance single number representing the average amount of variation in a data set Standard deviation Measure of the spread of scores out from the mean of the sample Authorctryhurn ID25285 Card SetPsyc312-8 Descriptionpsyc Updated2010-06-30T13:04:32Z Show Answers