A professor provides a special study guide to the students who chose seats in the front two rows of class. Later these students get better than average test scores. What is wrong with this experiment?
a. The professor failed to provide demand characteristics
b. The procedure probably had too many independent variables.
c. Students were not randomly assigned to groups.
d. The experiment did not have a hypothesis.
c
Psychology
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The difference between the highest and lowest numbers in a set of numbers is called the
a. range. b. variance. c. standard deviation. d. difference score. e. average difference.
Psychology
In a set of numbers with a mean of 10 and a variance of 9 the standard deviation is
a. 1. b. 81. c. 1.11. d. 19. e. 3.
Psychology