You have been discussing a research project with your friend James. James has told you that his research hypothesis states, the mean of population 1 is not equal to the mean of population 2 .
How would you write this research hypothesis in symbols?
a. H1 1 < 2
b. H0 1 < 2
c. H1 1 2
d. H0 1 = 2
Drews et al. (2008) manipulated driving conditions (i.e., driving while talking to a friend on the cell phone and driving while talking to a friend in the car) to see if this influenced the number of driving errors committed.
Participants completed the task on a driving simulator. The simulator was used to increase which of the following?
a. ecological validity
b. convergent validity
c. divergent validity
d. construct validity
What does the following mean in words: H0 1 = 2?
a. The mean of population 1 is equal to the mean of population 2
b. The mean of population 1 is not equal to the mean of population 2
c. The mean of sample 1 is not equal to the mean of sample 2
d. The mean of sample 1 is equal to the mean of sample 2
In the text, an article was described about Saturday morning cartoons. Specifically, the article stated there was a positive relationship between childhood aggression and violent cartoons.
However, no mention was made of how the term violent cartoons was defined. Thus, the researchers had failed to use a(n) when reporting their study.
a. operational definition
b. nominal definition
c. behavioral definition
d. attitudinal measure
_________ variables are not controlled for in the experiment but may have an influence on the dependent variable because they vary with the levels of the independent variables.
a. Extraneous
b. Nuisance
c. Attrition
d. History
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