PYSC 101 MODULE 1 EXAM
If r = 0.40, describe the direction and strength of the relationship between the two
variables. Positive, moderate
True or false? The larger the range of scores in a distribution, the greater the variability.
TRUE
If r= -0.25, is this an inverse or positive relationship? Positive
Which sample shows the greatest variability? (your answer should be Sample A,
Sample B, or Sample C)
Sample A: Mean= 91, Standard Deviation= 10
Sample B: Mean = 90, Standard Deviation = 15
Sample C: Mean = 75, Standard Deviation = 5
Sample B
Given a correlation coefficient of + 0.20, is this a strong or a weak relationship? Weak
True or false? Analyzing data is the final step of the scientific method. False
What is an additional, 5th step of the scientific method that psychologists are currently
emphasizing? Replication
What is the main problem that occurs when random selection is not used in a study?
The main issue that occurs is that it can be a skewed/biased sample, with increased
chances of error and does not represent the population as a whole in general.
True or false? In some cases, there are research situations with human subjects in
which random selection would be unethical. TRUE
What are the three areas or rules that IRBs focus on?
voluntary participation
benefits outweigh costs
participant selection is unbiased
If r = 0.40, describe the direction and strength of the relationship between the two
variables. Positive, moderate
True or false? The larger the range of scores in a distribution, the greater the variability.
TRUE
If r= -0.25, is this an inverse or positive relationship? Positive
Which sample shows the greatest variability? (your answer should be Sample A,
Sample B, or Sample C)
Sample A: Mean= 91, Standard Deviation= 10
Sample B: Mean = 90, Standard Deviation = 15
Sample C: Mean = 75, Standard Deviation = 5
Sample B
Given a correlation coefficient of + 0.20, is this a strong or a weak relationship? Weak
True or false? Analyzing data is the final step of the scientific method. False
What is an additional, 5th step of the scientific method that psychologists are currently
emphasizing? Replication
What is the main problem that occurs when random selection is not used in a study?
The main issue that occurs is that it can be a skewed/biased sample, with increased
chances of error and does not represent the population as a whole in general.
True or false? In some cases, there are research situations with human subjects in
which random selection would be unethical. TRUE
What are the three areas or rules that IRBs focus on?
voluntary participation
benefits outweigh costs
participant selection is unbiased
