This document discusses measures of central tendency including mean, median, and mode. It provides examples of calculating each from various data sets, such as employee ages, house prices, company profits, car speeds, and more. The mean finds the average value, the median finds the middle value after sorting the data, and the mode finds the most frequently occurring value(s).

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.

14. Pocket Camcorders

15. Pocket Camcorders – Mean, Median, ModeComplete the above table using your calculator

16. Buffalo Wings

17. Buffalo Wings – Mean, Median, ModeDownload the calculator on rtnj.blackboard.com and complete the following table for homework.