AP Psychology Unit 2

Which of the following is a measure of central tendency that is most influenced by extreme scores?

• Standard deviation

• Median

• Mean

• Mode

In a normal distribution (bell curve), what percentage of scores fall within one standard deviation from the mean?

• 95%

• 68%

• 99.7%

• 50%

What does standard deviation represent in a set of data?

• The average distance of a set of scores from the mean

• The score that occurs with the most frequency in a set

• The middle score in a set of data

• Whether or not the data was collected is valid

All of the following are measures of central tendency EXCEPT

• Mean

• Median

• Mode

• Correlation Coeffiient

In science, a theory is

• Based on several hypothses

• A testable explanation for a set of observations.

• always generates accurate findings

• an unverified idea or abstract concept

The independent variable

• is what one is trying to measure in a study

• must be testable

• is the condition that the researcher manipulates

• is the group that receives treatment

Which of the following is an example of random selection?

• Arbitrarily selecting names from everyone in the population to determine who will be in the study

• Selecting every tenth name from the census

• Splitting the alphabet in half to determine who will be in the experimental or control group

• Determining all of the individuals who can potentially participate in the study

What is the best way for a researcher to avoid unconsciously signaling any point of view to participants in a study?

• single-blind study

• double-blind study

• correlational design

• case study design

A graduate student wants to conduct a study to investigate people’s opinions regarding the death penalty. Because he has not yet taken his research methods course, he does not know which technique would be best to gather data on this issue. Based on what you know about research methods, which of the following techniques would work best for his proposed study?

• Individual case study

• survey

• group case study

• experiment

A researcher determined that the less practice teenagers had driving, the more moving violations they received during the first year after receiving their driver’s licenses. This finding is an example of which of the following?

• a negative correlation

• a positive correlation

• statistical significance

• illusory correlation