Test Your Understanding

Would you like to know how well you've mastered the concepts of Descriptive Statistics? Then take this short online quiz to assess your understanding. It's not for a grade, so don't worry about choosing the wrong value. If you reload the document, you will get a slightly different version of the test.

  1. Consider the histogram shown in the photo. Which measure of center is probably the best to use for this data?
    Standard Deviation
    Median
    Mean
  2. Which of the following statistics use all the data values?
    Midrange
    Median
    Variance
  3. Which of the following is a problem with using the variation as our primary measure of variance?
    The units are not the same as the original data
    It does not take the number of values into consideration
    It does not use all of the data
  4. You have data that has a few extreme outliers; which of the following is probably the best measure of center to use?
    Trimmed mean
    Harmonic mean
    Quadratic mean
  5. Which rule specifically describes the standard deviation for a bell shaped distribution?
    Chebyshev's rule
    Empirical rule
    Evaporation Theorem
  6. Which of the following statements is NOT true about the standardized score?
    The mean will be zero.
    It is found by subtracting the mean and dividing by the standard deviation.
    The mean is the same as the original mean.
  7. Which one of the following is NOT part of the five number summary?
    Mean
    3rd Quartile
    Maximum
  8. Which of the following statements is true about outliers?
    Mild outliers are more than 3 times the interquartile range beyond the quartiles.
    Extreme outliers are values in the top 5% or bottom 5% of the data.
    Extreme outliers are more than 3 times the interquartile range beyond the quartiles.

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Go to the James Jones ICTCM page.