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Summarizing and Making Inferences from Quantitative Data MCQ

Which of the following is appropriate for using the Kendall’s tau correlation coefficient?

Answer

Correct Answer: One variable measured on an ordinal scale and one variable measured on a continuous scale

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Testing an association between two variables requires ______.

Answer

Correct Answer: Variables measured at least on an ordinal scale

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Testing for a difference between three groups requires ______.

Answer

Correct Answer: Estimates of a summary measure of location for each group

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Which of the following is TRUE about reference distributions?

Answer

Correct Answer: Reference distributions are approximations which may be useful in practice.

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In hypothesis testing, a type I error is ______.

Answer

Correct Answer: Claiming an effect which is not actually real

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Which of the following is TRUE?

Answer

Correct Answer: The median is more robust than the mean.

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Which of the following is NOT true?

Answer

Correct Answer: Every data point contributes equally to a summary measure of spread.

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Suppose that one data point in a dataset is altered. Which of the following is guaranteed to change?

Answer

Correct Answer: Mean

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Which of the following measures of location is guaranteed NOT to change by adding a single extreme data point?

Answer

Correct Answer: None of these

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Which of the following is NOT true?

Answer

Correct Answer: Every data point contributes equally to a summary measure of location.

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