Lesson 5: Measuring Center with Mean and Median
September 4, 2016
Mon, Sep 5
Review:
- Histograms
Presentation:
- Measures of Center
- Mean
- Same as Average
- Sum of values divided by count
- Example
- Median
- Center value within ordered sequence of values
- Same as 50th Percentile
- 50/100 * count = position within ordered sequence of values
- If the position is between two numbers then take the average of those two values.
- Example
- Video:
- Example:
- Pass completion yardage by Justin Holman of UCF in game vs South Carolina State on Sat, Sep 3
- {-1,2,5,6,6,7,8,13,13,14,16,32,35,37}
- n = 14
- mean = 13.8
- median = 10.5
- Pass completion yardage by Justin Holman of UCF in game vs South Carolina State on Sat, Sep 3
- Mean
Activity:
- Determine the mean and median for the following data:
- Data set 1: {2, 4, 8, 4, 6, 2, 7, 8, 4, 3, 8, 9, 4, 3, 5}
- Data set 2: {7, -2, 5, 9, 0, -3, -6, -7, -4, -5, 2, -8}
- Data set 3: {213, 345, 609, 73, 167, 243, 444, 524, 199, 682}
Assignment:
- Read textbook pp. 30-34
- Watch Google Sheets functions video
- Try calculating mean and median in Sheets using the Student Survey data.
- Watch Sheets Tutorial 4