Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows. Person Dexterity Anxiety...

Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows.



Person Dexterity Anxiety



1 1 10



2 1 8



3 2 4



4 4 _2



c) figure the correlation coefficient;



d) figure whether the correlation is statistically significant(use the .05 significance level, two-tailed);



t needed (df = 2 p .05) =

r =

t =

Decision: reject the null hypothesis or do not reject the null hypothesis



Key:



t needed = cut-off score that establishes the region of rejection (also known as the critical value) both groups



r = score that represents the correlation coefficient



t = score that determines the significance of the correlation coefficient score