Which of the following examples shows a positive or direct correlation?
a) A study showing the correlation between reading scores and physical education scores is -.63.
b) A study showing the correlation between ice cream sales and heat is +.78.
c) The scattergram of pipe smoking and eye color.
d) The coefficient of determination.
a
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Studies about the economic benefit/cost ratio of contemporary immigration
A) universally show that immigration has a substantial negative effect on the economy. B) universally show that immigration has a substantial positive effect on the economy. C) universally show that immigration has no effect on the economy. D) are split on whether immigration is good or bad for the economy. E) find the effects are impossible to measure.
Evaluating the validity of balance of power theory is problematic because of the difficulty of measuring power
a. True b. False
What is the common purpose of using the double blinding and deception techniques?
a. they are more economical and easier to use than randomization or matching b. they keep participants' perceptions of the experiment constant across different conditions of the experiment c. they eliminate the effects of most known extraneous variables d. they eliminate experimenter bias
The CIA was severely criticized in the mid-1990s by Congress for
A) the Navy's Tailhook scandal. B) the incident at Ruby Ridge, Idaho, in which two people died. C) the Aldrich Ames affair in which a CIA officer betrayed the agency's secrets to Moscow. D) the Freemen of Montana check-cashing scandal. E) the Gennifer Flowers affair.