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Summary of research methods part 3

Data analysis and presentation- graphs scattergrams and tables

Bar chart

Used when the IV is nominal
data the categories can be
presented in any order


Used when the IV is at least
ordinal data the categories
must go in the correct order.


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Measures of central tendency

Mean- add up all the numbers and divide that total by the numbers in the
data set. So not use if there are any outliers as these will distort the mean-
use median instead.
Median- put the data in numerical order and select the middle number.…

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Strong Strong Weak positive Weak No correlation
positive negative correlation negative
correlation correlation correlation


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