Which is a measure of dispersion?
A) median
B) standard deviation
C) mode
D) all of the choices are correct
What is the mode of the following numbers: 10, 7, 7, 5, 8, 3, 4, 2?
A) 5.75
B) 7
C) 8
D) 6
What is the range of the following numbers: 10, 7, 7, 5, 8, 3, 4, 2?
A) 5.75
B) 7
C) 8
D) 6
The middle score in a distribution is the
A) mean.
B) median.
C) mode.
D) standard score.
If a distribution is asymmetrical through having more scores in one of the tails it would be described as
A) bimodal.
B) normal.
C) skewed.
D) kurtotic.
When you plot how many times each score or category of scores appears in the data you have a(n)
A) scatterplot.
B) main effect.
C) interaction.
D) frequency distribution.
The basic data entered into a meta-analysis are mean treatment effect sizes.
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If the result of an inferential statistical test fails to show a statistically significant difference, one must conclude that the levels of the independent variable are statistically the same.
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The standard levels of statistical significance used in psychology are the .05 and .10 levels.
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An inferential test determines the likelihood that two or more samples come from the same population.
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