Statistics and Research Methods Quiz Form
Test your knowledge of statistics and research methods. Please answer all questions below. This is a real quiz—no personal or sensitive data is required.
What is the mean of the following set of numbers: 4, 8, 6, 10, 2?
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6
5
7
8
Which of the following best describes a double-blind experiment?
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Neither participants nor experimenters know group assignments
Only participants know group assignments
Only experimenters know group assignments
Both participants and experimenters know group assignments
What is the primary purpose of inferential statistics?
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To summarize data
To draw conclusions about a population from a sample
To collect data
To visualize data
A researcher records the heights of 100 students. What type of variable is height?
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Nominal
Ordinal
Interval
Ratio
Which graph is most appropriate for showing the distribution of a categorical variable?
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Histogram
Bar chart
Scatterplot
Line graph
What is the probability of flipping heads twice in a row with a fair coin?
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1/2
1/4
1/8
1/16
Which of the following is NOT an assumption of the independent samples t-test?
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Normality
Homogeneity of variance
Random sampling
Dependent samples
Define 'null hypothesis' in research.
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A correlation coefficient of r = -0.85 indicates:
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A strong positive relationship
A weak positive relationship
A strong negative relationship
No relationship
What is the median of the following data set: 3, 7, 9, 15, 21?
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7
9
15
12
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