Set: Suitable Statistical Tests

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All 12 Terms

Term Definition
Mann Whitney U Test tests for the difference between the medians of two sets of data
Mann Whitney U Test needs at least 6 replicates per data set and ideally 8 or 10
Student's t-Test tests for the difference between the means of two sets of normally distributed data
Student's t-Test needs at least 12-15 replicates per data set before you can start to look for a normal distribution
Student's t-Test is unlikely to be appropriate for data in the form of percentages, proportions or counts of animals
Spearman Rank tests the strength of the correlation between two variables
Spearman Rank ideally needs 12-15 pairs of data with values more or less evenly spread along the axis
Spearman Rank Can't be used for scattergrams with a "U" or inverted "U" shaped pattern
Normal Distribution The symmetrical bell shaped distribution you get if you take a large series of measurements and then plot them on a frequency histogram.
Dispersion The spread of data around the average value
Correlation a relationship between two variables where as one variable changes then there is a corresponding change in the second variable.
Independent Variables A variable which you think may be important in "causing" variation in a second dependent Variable

Set Information

Terms 12
Creator tomchurch1
Created March 28, 2008
Groups None
Tags geography, investigative, skills
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Most Missed Words

  1. Spearman Rank → Can't be used for scattergrams with a "U" or inverted "U" shaped pattern - 2 misses
  2. Mann Whitney U Test → tests for the difference between the medians of two sets of data - 1 miss
  3. Mann Whitney U Test → needs at least 6 replicates per data set and ideally 8 or 10 - 1 miss
  4. Student's t-Test → is unlikely to be appropriate for data in the form of percentages, proportions or counts of animals - 1 miss
  5. Normal Distribution → The symmetrical bell shaped distribution you get if you take a large series of measurements and then plot them on a frequency histogram. - 1 miss
  6. Correlation → a relationship between two variables where as one variable changes then there is a corresponding change in the second variable. - 1 miss