Lev has just finished collecting data for his master's thesis. He now wishes to calculate a
statistic to determine statistical significance. What is the first step Lev should take?
a. Operationally define his variables
b. Calculate the mean scores for participants in each of his groups
c. Determine which of his participants responded the way they did due to chance factors
d. Calculate the range, variance, and standard deviation for scores from each of his groups
e. State his hypothesis about the nature of the relationships between variables
b. Calculate the mean scores for participants in each of his groups
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Which of the following explains why chimpanzees cannot make human sounds? a. Chimpanzees cannot learn to imitate
b. Chimpanzees are smaller than humans and make sounds at higher pitches. c. In chimpanzees, the left and right hemispheres are equal in size. d. Chimpanzees make sounds while inhaling instead of while exhaling.
Increased glutamate from stress may produce a state of sadness from dopamine depletion to trigger cravings for increased dopamine by using drugs, thereby enhancing
a. drug relapse. b. drug effects. c. drug tolerance. d. drug withdrawal.
A design in which some cells or combinations in a factorial design are intentionally left empty is said to be ____
a. imperfect b. incomplete c. partial d. limited
Short-term memory can hold ______ for ______
a. only a few items; a matter of seconds b. a vast number of items; a matter of seconds c. only a few items; many years d. a vast number of items; many years