As the number of hours of sleep decreases, the more a person drinks caffeinated beverages. This is an example of what type of correlation? O Negative correlation Positive correlation O Weak relationship O Strong correlation Question 2 1 pts A correlation coefficient of -1 indicates that there is a: Perfect negative relationship O Weak positive relationship Weak negative relationship Perfect positive relationship Question 3 1 pts Correlation coefficients are used when you are looking for a relationship or an association between variables in how many samples? One O Two O Five O Any number of samples