correlation

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Last updated 1:12 PM on 9/10/26
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5 Terms

1
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what graph used in correlation

scattergraph

2
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explain why scattergraph appropriate to use for correlation data

the study is correlation / looks at relationship between 2 co-variables

scattergram display relationship between 2 co - variables

3
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why is it not appropriate for researcher to conclude causation in co variable

correlation only shows relationship between 2 co- variavles

researchers conclusion implies causation

however :

  • no manipulation of Independent variable in correlation → cause and effect cannot be established

  • third (untested) variable could be responsible for the relationship/ correlation between co- variables



4
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how to calculate correlation co-efficient

use inferential test eg Pearson r ( for interval data) or spearman’s rho

5
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what type of hypothesis is positive/ negative correlation

1 tailed / directional hypothesis