The following questions are based on the summarized table:
Hours Studied: 1, 2, 3, 5, ∑X = 11
1, 4, 9, 35, ∑X² = 39
3, 5, 5, 9, ∑Y = 22
9, 25, 25, 81, ∑Y² = 140
3, 10, 15, 45, ∑XY = 73
Q3: What is the covariance?
Q4: What is the standard deviation of the predictor variable?
Q5: What is the standard deviation of the criterion variable?
Q6: What is the Pearson's r value?
Q7: What is the best interpretation of your Pearson correlation in Q6?
a) As "hours studied" goes up, there is a corresponding increase in "score on quiz."
b) As "hours studied" goes up, there is a corresponding decrease in "score on quiz."
Q8: The strength of the above relationship is considered:
a) Weak
b) Moderate
c) Strong