PSYC 510 Research Methods and Statistics in Psychology I –Quiz -
z scores and Inferences 44 out of 50 actual quizzes 2025 Liberty
University
Score for this quiz: 44 out of 50
Question 1
pts
A distribution is shaped like a
bell. normal
bimodal
positively skewed
negatively skewed
Question 2
pts
Which of the following is a characteristic of a normal
distribution? It is asymmetrical.
Most scores are on the right.
There are two distinct peaks.
Scores taper off at both ends.
Question 3
pts
, Suppose the type of computer game (violent vs. scavenger hunt) really has
an impact on players’ aggression but you do not reject the null hypothesis.
You have made
.
a Type I error
a Type II error
a correct decision
a Type III error
Question 4
pts
Individual differences within the sample such as age, gender, and
education level can create uncontrolled differences in the measure of our
study. This difference is called
variance, and it can the power of our study.
between-groups; increase
independent groups; decrease
within-groups or error; decrease
between-groups; decrease
IncorrectQuestion 5
pts
z scores and Inferences 44 out of 50 actual quizzes 2025 Liberty
University
Score for this quiz: 44 out of 50
Question 1
pts
A distribution is shaped like a
bell. normal
bimodal
positively skewed
negatively skewed
Question 2
pts
Which of the following is a characteristic of a normal
distribution? It is asymmetrical.
Most scores are on the right.
There are two distinct peaks.
Scores taper off at both ends.
Question 3
pts
, Suppose the type of computer game (violent vs. scavenger hunt) really has
an impact on players’ aggression but you do not reject the null hypothesis.
You have made
.
a Type I error
a Type II error
a correct decision
a Type III error
Question 4
pts
Individual differences within the sample such as age, gender, and
education level can create uncontrolled differences in the measure of our
study. This difference is called
variance, and it can the power of our study.
between-groups; increase
independent groups; decrease
within-groups or error; decrease
between-groups; decrease
IncorrectQuestion 5
pts
