## Podcast Beta

## Questions and Answers

What happens if you run a correlation analysis on non-linear data

What result do you see when variables are completely independent of each other.

Which of the following is FALSE

We are measuring a correlation between water and H2O molecules, which we expect to have a high correlation. Which of the following is TRUE?

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For each of the following, indicate whether you would expect a positive or a nega- tive correlation. a. Model year and price for a used Honda b. IQ and grade point average for high school students c. Daily high temperature and daily energy consumption for 30 winter days in New York City

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he data points would be clustered more closely around a straight line for a corre- lation of -0.80 than for a correlation of +0.05. (True or false?)

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If the data points are clustered close to a line that slopes up from left to right, then a good estimate of the correlation would be +0.90. (True or false?)

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If a scatter plot shows a set of data points that form a circular pattern, the correla- tion should be near zero. (True or false?)

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Describe what is measured by a Pearson correlation.

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Can SP ever have a value less than zero?

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Which of the following statements best describes the concept of "regression toward the mean" in statistical analysis?

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In null hypothesis testing, the null hypothesis (H0) typically represents:

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In the context of correlation analysis, why is it especially important for the correlation value to be relatively high when dealing with low sample sizes?

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Which of the following is FALSE.

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Increasing the number of items on a scale _____ the Cronbach's Alpha.

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Which of the following is correct?

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