Q-Q plots test form

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Q-Q plots test form

Data points may not all lie on the normal qq line, even if they are generated from normal distribution.

The lineup protocol is a way to help students interpret Q-Q plots while they are still honing their intuition.

In the following test questions, a true data plot is generated from the indicated distribution, and a set of null plots are generated from the standard normal distribution.

Students are asked if they can identify the true data plot. For each lineup, enter your answer as a single number below the plot.

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1. t-distribution with df=5

Please select ONE plot that is different from others, and put your number on the line below (no spaces) *

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2. Scaled t-distribution with df=5

Please select ONE plot that is different from others, and put your number on the line below (no spaces) *

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3. t-distribution with df=30

Please select ONE plot that is different from others, and put your number on the line below (no spaces) *

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4. Cauchy distribution

Please select ONE plot that is different from others, and put your number on the line below (no spaces) *

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5. Contaminated normal distribution

Please select ONE plot that is different from others, and put your number on the line below (no spaces) *

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