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  • 1. Working with Quantitative Data
    Measures of Central Tendency
    Mean, Median, Mode
  • 2. Measures of Central Tendency
    Mean, median and mode are called measures of central tendency
    They provide a one number summary of set of numbers
    Since they can only provide one number to represent the entire data set, they target the center, but in different ways
  • 3. How do you calculate a mean?
    The following are the ages (in years) of all eight employees of a small company:
    53 32 61 27 39 44 49 57
    Find the mean age of these employees.
  • 4.
  • 5.
  • 6. How do you find a median?
    The following data give the prices (in thousands of dollars) of seven houses selected from all houses sold last month in a city.
    312 257 421 289 526 374 497
    Find the median.
  • 7.
  • 8. How do you find a median?
    The following table gives the 2008 profits (rounded to billions of dollars) of 12 companies selected from all over the world.
    Find the median of these values.
  • 9.
  • 10. How do you identify the mode(s)
    The following data give the speeds (in miles per hour) of eight cars that were stopped on I-95 for speeding violations.
    77 82 74 81 79 84 74 78
    Find the mode(s) of these values.
  • 11.
  • 12. How do you identify the mode(s)
    For the table in Question 3 on the previous page, find the mode(s) of these values.
  • 13.
  • 14. Pocket Camcorders
  • 15. Pocket Camcorders – Mean, Median, Mode
    Complete the above table using your calculator
  • 16. Buffalo Wings
  • 17. Buffalo Wings – Mean, Median, Mode
    Download the calculator on rtnj.blackboard.com and complete the following table for homework.