Exam Preparation Quiz Flashcards
M
sample mean
μ
population mean
SD
sample standard deviation
σ
population standard deviation
N
sample size
X
raw score
Independent measures
t-test
You want to compare a sample mean of group 1
to the sample mean of group 2 (note, members
in group 1 are not the same as members in
group 2)
Pearson’s correlation
coefficient
Is for measuring a relationship between two things. A Correlation Coefficient tells us about magnitude (strength) and direction. E.g. You are interested in the relationship between
smartphone addiction and anxiety
z-test
You want to compare a sample mean (M) to a
population mean, and dividing by the standard error (SE) of the mean. The population standard
deviation is known
Single sample t-test
You want to compare a sample mean (M) to a
population mean, but the population standard deviation is not known
Repeated meausres t-test
You want to compare the difference between
the participants scores at time 1 and participants scores at time 2
Matched subjects t-test
You want to compare a sample mean of group 1
to the sample mean of group 2 (note, members
in group 1 are considered equivalent (but are
not the same) to members in group 2)
What is the correct test to run based on SPSS data
Relationship between two scale variables
Correlation coefficient
What is the correct test to run based on SPSS data
One categorical variable, one continuous variable
Independent measures t-test
What is the correct test to run based on SPSS data
Difference between two scale variables
Repeated measures t-test
What is the correct test to run based on SPSS data
One scale variable
Single-sample t-test
Is there a difference between Stress at Time 1 and Stress at Time 2? The researcher should
run a __________________________ test. Because…
Repeated measures t-test. Because the question is referring to the difference between two scale variables
What if the question was ‘is there a relationship between Stress at Time 1 and
Stress at Time 2?’ What test would be appropriate to run to answer this
research question? __________
Correlation coefficient as the question is referring to the relationship between two scale variables
Is there a difference between men and women’s extraversion scores? The researcher should
run a __________________________ test
Independent measures t test as the question refers to one categorical variable (gender) and one scale variable (extraversion scores)
Is there a difference between sample optimism mean and population optimism mean (μ =
49)? The researcher should run a __________________________ test.
Single sample t-test as the question refers to comparing a sample mean to the population mean but the population standard deviation is not known
Carmen is interested in comparing her clinical sample mean score (M = 16) on the Generalised Anxiety Disorder Measure to the population mean (μ = 15). Carmen does not have the
population standard deviation (σ is not known)
Which test/method/procedure should be used?
single-sample t-test
Do men or women have higher narcissism scores? A researcher wants to compare men’s mean score (M = 25) on the Narcissism Personality Inventory to women’s mean score (M =
23).
Which test/method/procedure should be used?
Independent measures t-test
Thomas is interested if there is a mean difference between the sample depression mean (M = 40) and the population mean (μ = 45, σ = 5).
Which test/method/procedure should be used?
Z-test
Zoe is curious whether she has a higher aptitude score in verbal (X = 25, M = 28, SD = 5) or maths (X = 20, M = 23, SD = 3).
Which test/method/procedure should be used?
z-score (standardised score)
