Question 6
Incorrect
0 / 2 pts
Before hypothesis testing and at the beginning of a study, a
researcher is advised to conduct a(n) ________ because it
________.<br>
Before hypothesis testing and at the beginning of a study, a researcher is advised
to conduct a(n) ________ because it ________.
effect size estimate; tells researcher the number of participants needed for
trustworthy results
power analysis; tells the researcher the number of participants needed for
trustworthy results
alpha testing; determines how meaningful the study results will be

Question 8
Correct!
2 / 2 pts
The larger the effect size, the:<br>
The larger the effect size, the:

Question 9
Correct!
2 / 2 pts

Skip to question text.
Imagine that a study of memory and aging finds that younger participants correctly
recall 55% of studied words, older participants correctly recall 42% of studied
words, and the size of this effect is Cohen's
d
= 0.49. According to Cohen's
conventions for interpreting
d
, this effect is:

Question 10
Correct!
2 / 2 pts
If you are correct about the expected direction of an effect,
then using a one-tailed hypothesis test instead of a two-tailed
hypothesis test:<br>
If you are correct about the expected direction of an effect, then using a one-tailed
hypothesis test instead of a two-tailed hypothesis test:

Score for this attempt:
18
out of 20
Submitted Oct 1 at 11:11am
This attempt took 10 minutes.
Question 1
Correct!
2 / 2 pts
The symbol representing a standard deviation calculated by
using a sample to estimate the population standard deviation
is:
The symbol representing a standard deviation calculated by using a sample to
estimate the population standard deviation is:
Question 2

Correct!
2 / 2 pts
The correct formula for effect size using Cohen's <em>d</em>
for a paired-samples <em>t</em> test is:
The correct formula for effect size using Cohen's
d
for a paired-samples
t
test is:

s

Question 3
Incorrect
0 / 2 pts
Skip to question text.
A study by Bettmann (2007) published in the
Journal of the American
Psychoanalytic Association
assessed whether the attachment relationships between
adolescents and their parents change as a result of a residential wilderness
treatment experience for the adolescents. Participants completed the Adolescent
Attachment Questionnaire at the start and at the end of the wilderness program.
Which statistical test would we use to determine whether the wilderness treatment
affected attachment relationships?