Introduction to Statistical Testing (AQA A-Level Psychology): Flashcards
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Practise the cards
10 cards from this deck
Statistical significance
Statistical significance
Results unlikely by chance; suggest genuine effect or difference
Sign test purpose
Sign test purpose
Non-parametric test for difference between related data sets
Sign test: rule for significance
Sign test: rule for significance
Observed value must be ≤ critical value
Sign test: how to find observed value
Sign test: how to find observed value
Count the less frequent sign
Sign test: participants with no preference
Sign test: participants with no preference
Omit them from the analysis
Correlation coefficient range
Correlation coefficient range
+1.0 to -1.0
Perfect positive correlation value
Perfect positive correlation value
+1.0 (one variable increases, other increases)
Perfect negative correlation value
Perfect negative correlation value
-1.0 (one variable increases, other decreases)
Strong correlation coefficient range
Strong correlation coefficient range
0.7 to 1.0 or -0.7 to -1.0
Spearman's rho vs Pearson's
Spearman's rho vs Pearson's
Spearman's: non-parametric; Pearson's: parametric