Tobacco and alcohol cause more deaths through sickness and accidents than all illicit drugs combined

What is the typical dependent variable used in studies of the operant conditioning of lever pressing in rats?

a. the number of responses per minute b. the cumulative record of lever presses c. the average intensity of lever presses d. none of the above

According to the article Apparent from the Parents about different parenting styles and adolescent behavior outcomes, the problem with a very large sample in survey research is that:

(a) with large samples statistics are difficult to interpret (b) large samples are biased (c) large samples are unrepresentative (d) large samples have too much variability