Working with Quantitative DataMeasures of Central TendencyMean, Median, Mode
Measures of Central TendencyMean, median and mode are called measures of central tendencyThey provide a one number summary of set of numbersSince they can only provide one number to represent the entire data set, they target the center, but in different ways
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	57Find the mean age of these employees.
Working with quantitative data
Working with quantitative data
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	497Find the median.
Working with quantitative data
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.
Working with quantitative data
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	78Find the mode(s) of these values.
Working with quantitative data
How do you identify the mode(s)For the table in Question 3 on the previous page, find the mode(s) of these values.
Working with quantitative data
Pocket Camcorders
Pocket Camcorders – Mean, Median, ModeComplete the above table using your calculator
Buffalo Wings
Buffalo Wings – Mean, Median, ModeDownload the calculator on rtnj.blackboard.com and complete the following table for homework.

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Working with quantitative data

  • 1. Working with Quantitative DataMeasures of Central TendencyMean, Median, Mode
  • 2. Measures of Central TendencyMean, median and mode are called measures of central tendencyThey provide a one number summary of set of numbersSince 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 57Find the mean age of these employees.
  • 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 497Find the median.
  • 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.
  • 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 78Find the mode(s) of these values.
  • 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.
  • 15. Pocket Camcorders – Mean, Median, ModeComplete the above table using your calculator
  • 17. Buffalo Wings – Mean, Median, ModeDownload the calculator on rtnj.blackboard.com and complete the following table for homework.