Quiz: Basics Of Research
Due Aug 24 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 16 minutes 30 out of 30
LATEST Attempt 2 16 minutes 30 out of 30
Attempt 1 6 minutes 27 out of 30
Score for this attempt: 30 out of 30
Submitted Aug 19 at 11:26am
This attempt took 16 minutes.
Correct answer
Question 1
3 / 3 pts
Which of the following is NOT necessary for causal inference?
external validity
X preceeds Y
the proposed cause covaries with the outcome
a theory explains the causal relationship
Correct answer
Question 2
3 / 3 pts
What does it mean if a sample is "representative"?
it has similar characteristics as the population
it is unique
it is ethical
it is a convenience sample
Correct answer
Question 3
3 / 3 pts
Which of the following is NOT true about the standardization of scores?
the standard deviation always equals two
each x score becomes a z score
the mean is 0
z scores can be converted into raw values if the sample characteristics are known
Correct answer
Question 4
3 / 3 pts
The standard deviation of z scores:
is one
is the same as the hypothetical population
is .05
is 1.96 when the sample size is large
Correct answer
Question 5
3 / 3 pts
Quasi-experimental designs:
tend to occur in natural settings
always have random assignment
do not involve an intervention
typically have weak external validity
Correct answer
Question 6
3 / 3 pts
Which of these is NOT one of the characteristics of z scores?
a standard deviation of .05
they are expressed in standard deviation units
their distribution has a mean of zero
a proportion of area under the distribution can be interpreted as a probability
Correct answer
Question 7
3 / 3 pts
Which of the following is NOT considered to be quantitative?
nominal
ordinal
interval
ratio
Correct answer
Question 8
3 / 3 pts
The degree to which a study supports a causal relationship is:
internal validity
construct validity
discriminant validity
external validity
Correct answer
Question 9
3 / 3 pts
What does it mean that X must not be confounded with another variable for causal inference?
X must not be systematically associated with an unaccounted for variable
X must not be related to Y
X must only occur before Y
all of the variance in the dependent variable must be accounted for by X
Correct answer
Question 10
3 / 3 pts
If researchers infer causality, they are claiming:
the independent variable is having an effect on the dependent variable
the dependent variable is having an effect on the independent variable
the confounding variable is having an effect on the dependent variable
the confounding variable is having an effect on the independent variable
Quiz Score: 30 out of 30
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