Stat 324 Review

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Stat 324 - Review
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Last Time Regression to the mean

• Wikipedia
• SI article

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Reminders

• Four people to bring laptops with ability to
  download data from course webpage
• Office hours
• Thursday 12-1 in library (35-111B)
• Email this evening
• Leeway at 3?

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Exam Advice

• Review homework problems, solutions
• Be ready to explain your reasoning
• Be ready to apply your knowledge
• Parts of a problem usually do not have to be
  answered in order
• Work problems
• Ask review questions

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The Translations

• Describe the relationship
• Scatterplot, correlation coefficient form,
  direction, strength
• Fit a model
• Run a regression (consider transformations)
• Increase in y with each increase in x
• Slope
• Is the model valid? Is the model appropriate?
• Residual analysis
• Is the relationship statistically significant?
• p-value (watch for positive, negative), all steps
• Is the model useful?
• R2, significance
• Estimate XXX
• Point estimate and interval estimate
• Genearlizabilty, cause and effect
• Look at study design

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Distance vs. time
Decrease y power (.5, log, -1) or increase x
power (2)
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Distance vs. time