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### 21 Cards in this Set

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• Back
 Descriptive measures allow researchers to... reduce a data set to a single label or value Using a single number to summarize an entie set of scores is called... Data Reduction Techniques Mode -definition- Category or score that occurs the most often in a data set Unimodal Distribution -definition- One score clearly occurs more often No Mode means.... That no score occurs more than once Bimodal distribution is...., while Multimodal means... Bimodal - A tie between 2 most frequently occuring Multimodal - 3 or more tie Mo stands for Mode MEDIAN -definition- Divides the number of observations in an ordered distribution into 2 Equal parts Median Formula [(N+1)/ 2] What is the easiets way to order scores? Create a cumulative frequency distribution Mn or Mdn stands for Median MEAN -definition- Arithmetic mean, The numerical center of a distribution Mean allows a user to... Make use of all informaiton avialable within a data set OUTLIER -definition- A score that differs dramatically from others in the set Mean formula: ∑Xs in the data set ---- N Level of Measurement and Central Tendency Level of Measurement and Central Tendency Nominal only MODE Ordinal Mode or Median Interval / Ratio Mode, Median, or Mean BIFURCATED split in data set (opinions) Median is the preferred method of central tendency when... there is a Skewed distribution because it is more resistant outliers