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21 Cards in this Set

  • Front
  • 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