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) =
Decision: reject the null hypothesis or do not reject the null hypothesis
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
Step by step method for correlation analysis is discussed here.Scatter diagram and significance of correlation are explained in the solution.