Use the preparation materials to prepare hand-written answers for the following questions. Please ask any questions on the "Questions -- Preparation Guide" on the course Team (see link on the homepage.)
  1. What are three numerical measures of center?
  2. Define “median.”
  3. What are the steps for computing the median?
  4. Define “arithmetic mean.” What is a synonym?
  5. What are the steps for computing the mean?
  6. Compute the median and mean of these seven numbers: 3,7,3,8,8,4,2.
  7. Compute the median and mean of these eight numbers: 3,7,3,8,8,4,2,9.
  8. Define “mode.”
  9. Define “bimodal.”
  10. What are three numerical measures of dispersion?
  11. Define “Q1”, “Q3”, and “IQR”.
  12. What are the steps for computing the IQR?
  13. Should the IQR be presented with one or two values? Explain.
  14. What are the six steps for computing the standard deviation?
  15. Approximate the standard deviation of these five numbers: 3,5,6,5,6. [Hint: find the mean and then think about how a standard deviation is interpreted.]
  16. Calculate the actual standard deviation of the five numbers in the previous item.
  17. Define “range.”
  18. Should the range be presented with one or two values? Explain.
  19. What symbols are used to represent the sample mean, population mean, sample standard deviation, and population standard deviation? [Hint: you may find the glossary of symbols on the resources page useful]
  20. What is plotted on the x- and y-axes of a histogram?
  21. How many bins or bars is ideal in a histogram?
  22. What does the height of a bar on a histogram tell you?
  23. What numbers make up a boxplot?
  24. What is a frequency table? [Hint: What values are in a frequency table?]
  25. What is a percentage table?
  26. How is a percentage table constructed from a frequency table?
  27. How are a percentage and a proportion related? [Hint: How do you turn a proportion into a percentage and a percentage into a proportion?]
  28. What is on the x- and y-axes of a bar chart?
  29. What does the height of a bar in a bar chart tell you?
  30. What is wrong with a pie chart?
  31. What questions do you have from this reading that you would like me to address? [Please be as specific as possible. Don’t just say “everything” or “I don’t understand anything.” Of course, you can ask questions about the reading before class on MS Teams (see link above).]