What kind of t test would you use to solve these two question a t test for dependent means, a t test for independent means, or a single-sample t test? 1.A psychologist tested the effect of a science fiction movie on people's belief in the supernatural. Seven people completed a measure of belief in the supernatural (high scores indicate high levels of belief) before and after watching a popular science fiction movie. Participants' scores are listed below. Belief-in-Supernatural Scores, Before and After Watching a Science Fiction Movie Participant Before After A33 B 5 3 C 9 6 D 6 8 E. 7 8 F 5 2 G 4 1 2.A psychologist wanted to know if customers really are influenced to buy more by sales clerks who smile more than clerks who do not smile more. To test this hypothesis, clerks at eight stores in a large clothing chain were given special instructions at the start of a week, and then sales over the week were recorded. Four of the stores were randomly selected to have the clerks receive instructions to be especially courteous and to smile a lot (Smile Condition). Clerks at the other four stores were instructed to be especially courteous only (Control Condition). The mean sales (in thousands of dollars) for the clerks in the four stores in the Smile Condition was 39 (SS = 44), and the mean sales for the clerks in the four stores in the Control Condition was 32 (SS = 94).