Quiz: Comparing Two Independent Groups
Due Sep 21 at 11:59pm
Points 30
Questions 10
Time Limit 45 Minutes
Allowed Attempts Unlimited
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
KEPT Attempt 2 11 minutes 30 out of 30
LATEST Attempt 2 11 minutes 30 out of 30
Attempt 1 9 minutes 21 out of 30
Correct answers are hidden.
Score for this attempt: 30 out of 30
Submitted Aug 19 at 9:20pm
This attempt took 11 minutes.
Question 1
3 / 3 pts
The homogeneity of variance assumption means that:
the scores of each of the groups are distributed around their respective means similarly
the two groups have an affinity for one another
the two groups have no relationship with one another
the two groups' scores are identical
Question 2
3 / 3 pts
What is not an assumption about the dependent variable in an independent samples t test?
the variance of the outcome variable should not be different between the two groups that are compared
the Y outcome variable must be quantitative
the outcome variable should at least have an interval level of measurement
the outcome variable should be platykurtic distributed
Question 3
3 / 3 pts
In a one-tailed test, what do you do first?
examine the means to determine if they are consistent with the hypothesized difference
check the Sig column
check the Sig (two-tailed) column
check the t column
Question 4
3 / 3 pts
All of the following about confidence intervals should be included in the results section except:
standardized means
upper limit
lower limit
level of confidence
Question 5
3 / 3 pts
In SPSS, to conduct a independent-samples t test you must go to the main menu:
Analyze
Transform
t-tests
Graphs
Question 6
3 / 3 pts
In SPSS, you must do all of the following to conduct an independent samples t-test except:
identify Options
move your independent variable to the Grouping Variable
move your dependent variable to the Test Variable(s) box
define your groups
Question 7
3 / 3 pts
All of these are measures of effect size except for:
SD
Cohen's d
r2
η2
Question 8
3 / 3 pts
How would a researcher interpret an η2 value of .27?
27% of the variance in one variable is explained by another variable.
2.7% of the variance in one variable is explained by another variable.
.27% of the variance in one variable is explained by another variable.
.05% of the variance in one variable is explained by another variable.
Question 9
3 / 3 pts
Which statistic is an estimate of the magnitude of difference between the means of two groups measured in
standard deviation units?
Cohen’s d t2
η2
β
Question 10
3 / 3 pts
To use an independent t test the independent variable must NOT be:
quantitative
have two unique values
dichotomous
nominal
Quiz Score: 30 out of 30
