Score for this attempt: 11 out of 12.5
Question 1
0..5 pts
When the systematic variance is a lot larger than the unsystematic variance, the F-value
is ____ and the likelihood of such a result occurring because of sampling error is _____
Correct!
large; low
small; low
small; high
large; high
Question 2
0..5 pts
An experiment was done to look at whether different relaxation techniques could predict
sleep quality better than nothing. A sample of 400 participants were randomly allocated
to one of four groups: massage, hot bath, reading, or nothing. For one month each
participant received one of these relaxation techniques for 30 minutes before going to
bed each night. A special device was attached to the participant's wrist that recorded
their quality of sleep, providing them with a score out of 100. The outcome was the
average quality-of-sleep score over the course of the month. Which test could we use to
analyse these data?
Correct!
Regression or ANOVA
Chi-square
,Regression only
ANOVA only
Question 3
0..5 pts
Imagine that you're interested in testing the effect of car brand (e.g. Toyota, Honda,
Ford, and Kia) on yearly car maintenance costs. Due to your expertise in the subject,
you think that Kia will have higher maintenance costs than the other three, Ford will
have higher costs than Toyota and Honda, and Honda will have higher costs than
Toyota. Which of the following will you perform?
Post hoc contrasts
Correct!
Planned contrasts
Question 4
0..5 pts
A psychologist was looking at the effects of an intervention on depression levels. Three
groups were used: waiting list control, treatment, and post-treatment (a group who had
had the treatment 6 months before). The SPSS output is below. Based on this output,
what should the researcher conclude?
, The treatment group was significantly different from the post-treatment and control
groups, and the post-treatment group was significantly different from the control group.
The post hoc tests are inconclusive.
The treatment group was significantly different from the control group but not the post-
treatment group, and the post-treatment group was not significantly different from the
control group.
Correct!
The treatment group was significantly different from the control group but not the post-
treatment group, and the post-treatment group was significantly different from the
control group.
Question 5
0..5 pts
When conducting a one-way independent ANOVA with three levels on the independent
variable, an F-ratio that is large enough to be statistically significant tells us:
Correct!
Question 1
0..5 pts
When the systematic variance is a lot larger than the unsystematic variance, the F-value
is ____ and the likelihood of such a result occurring because of sampling error is _____
Correct!
large; low
small; low
small; high
large; high
Question 2
0..5 pts
An experiment was done to look at whether different relaxation techniques could predict
sleep quality better than nothing. A sample of 400 participants were randomly allocated
to one of four groups: massage, hot bath, reading, or nothing. For one month each
participant received one of these relaxation techniques for 30 minutes before going to
bed each night. A special device was attached to the participant's wrist that recorded
their quality of sleep, providing them with a score out of 100. The outcome was the
average quality-of-sleep score over the course of the month. Which test could we use to
analyse these data?
Correct!
Regression or ANOVA
Chi-square
,Regression only
ANOVA only
Question 3
0..5 pts
Imagine that you're interested in testing the effect of car brand (e.g. Toyota, Honda,
Ford, and Kia) on yearly car maintenance costs. Due to your expertise in the subject,
you think that Kia will have higher maintenance costs than the other three, Ford will
have higher costs than Toyota and Honda, and Honda will have higher costs than
Toyota. Which of the following will you perform?
Post hoc contrasts
Correct!
Planned contrasts
Question 4
0..5 pts
A psychologist was looking at the effects of an intervention on depression levels. Three
groups were used: waiting list control, treatment, and post-treatment (a group who had
had the treatment 6 months before). The SPSS output is below. Based on this output,
what should the researcher conclude?
, The treatment group was significantly different from the post-treatment and control
groups, and the post-treatment group was significantly different from the control group.
The post hoc tests are inconclusive.
The treatment group was significantly different from the control group but not the post-
treatment group, and the post-treatment group was not significantly different from the
control group.
Correct!
The treatment group was significantly different from the control group but not the post-
treatment group, and the post-treatment group was significantly different from the
control group.
Question 5
0..5 pts
When conducting a one-way independent ANOVA with three levels on the independent
variable, an F-ratio that is large enough to be statistically significant tells us:
Correct!
