3. Coefficient of correlation = - 0.25 means (a) Strong positive correlation (b) Weak positive correlation (c) Strong Negative correlation (d) Weak Negative correlation

Pearson correlation statistic is only valid when the relationship between the two quantitative (continuous) variables is

In correlational research the Null hypothesis states that Choose one the correlation coefficient is 0 or The correlation is significantly different between groups or the correlation coefficient is 1.00 or -1.00

Researchers were interested in assessing whether stress levels at the beginning of the semester are related to (i.e., correlated with) stress levels during finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week.     Participant Stress 1 Stress 2 (X - MX) (Y - MY)  (X - MX) (Y - MY) (X - MX)2 (Y - MY)2  1 22 22 -4.4 -6       2 32 34 5.6 6       3 24 25 -2.4 -3       4 28 30 1.6 2       5 26 29 -0.4 1         What is the observed correlation coefficient (i.e., r value)?