# Exploration of Measures of Spread

- Author:
- Shannon Bryant, Ms Grubbs, Rose Neal, Steve Phelps, GoughPMHS

- Topic:
- Boxplot

## Exploration

Click on this link: explore box and whisker plots

http://math.andyou.com/tools/boxandwhisker.html
**Input 10 values into the table. Use values between 0 - 100. Write the 5-Number Summary on your scratch sheet.**__Trial 1:__**Add 2 more values to Trial 1. Make sure 1 value is much higher and the other value is extremely low. Write the 5-Number Summary on your scratch sheet.**__Trial 2:__**Add 20 to 5 different values in your table. Write the 5 - Number Summary**__Trial 3:__**Add 2 more values to your table. Either add 2 high numbers or 2 low numbers. Write the 5 - Number Summary REFLECTION: How does the shape of the graph change as you add low numbers versus high numbers to your table? What does the shape tell you about the data?**__Trial 4:__## Analyzing Box-&-Whiskers Plot

## How does a Box-&-Whiskers Plot describe the SPREAD of the data?

The Box-&-Whiskers Plot breaks the data into __________ equal groups. Quartile 1 divides the bottom 50% in __________. Quartile 3 divides the upper 50% in _________________. The median divides the ENTIRE data set in __________________. The end of the left whisker represents the ___________________. The end of the right whisker represents the __________________. The shape of the Box-&-Whisker tells you how spread out the data is in each group. The box represents the middle 50%. The left whisker represents the bottom ____________%. The right whisker represents the upper ___________________%.