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 * Aim:** How do we apply measures of central tendency to solve problems?

At the end of the lesson, you will be able to... 1. explain what is meant by grouped data 2. define mean, median, and mode 3. calculate mean, median, and mode from a grouped frequency distribution chart 4. calculate mean, median, and mode from a stem-and-leaf plot 5. use the calculator to compute mean, median, and mode 6. compute weighted averages 7. apply measures of central tendency to solve problems

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 * Find central tendency of a stem-and-leaf chart**

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 * This video shows how to find meaures of central tendency using the graphing calculator. Copy down the steps. You may use the graphing calculator to solve problems.**

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 * Here is a video on how to compute weighted averages:**


 * Classwork:** Answer the following questions. You may use your graphing calculator to help you.




 * Homework:** 3 - 21 odd






 * Answers:**




 * Journal entry:** Your test scores are 100, 100, 100, 100, 100, 100, 100, 100, 50 and 50. All were full period tests weighted equally. Your teacher claims that your average is 75 since your average on the first 8 tests was 100 and you average on you last two test was 50. Explain how you would argue this incorrect.