1. Histogram By: Amy Domenick, Rachael Dorn, and Lauren Burkert

2. About a Histogram A histogram is a graphical display of data using bars that are different heights. It groups numbers into ranges.

3. About a Histogram When do you use this graph? To show continuous data (which is data that represents measured quantity) or grouped numerical data Some examples are: weight, height, how much time

4. Data Needed Numerical data: Observations or values that can be measured Single set of data * You can use 2 sets of data

5. 1 set of data vs. 2 sets of data

6. Bar Graph vs. Histogram

7. Example of a Histogram

8. Data Number of hoursNumber of people 55 5.51 63 6.50 74 7.53 84 8.51 92

9. Data in Excel The frequency shows how many times the number occurs

10. Graph

11. What this graph means? This histogram shows that on the night of 2/10/14 most people in the class got 7- 7.9 hours of sleep. This is less than the recommended hours (8 1/2 – 9+) of sleep we should be getting each night. It also shows that almost 70% of us got less than the recommended hours.

12. Quiz Problem How many people got the recommended sleep hours for teens? (8 1/2 - 9+) How many pieces of data are used in the graph?

13. Answers 7 people 23

14. How to make this graph? http://youtu.be/mqF8isv6qAA

15. Advantages It is easy to read and comprehend the data in the graph. It shows continuous data.

16. Disadvantages Not that many people know how to make and/or use a histogram. You cannot read exact values because the numbers are grouped together.

17. Sources http://kidshealth.org/teen/your_body/take_care/how_m uch_sleep.htmlhttp://kidshealth.org/teen/your_body/take_care/how_m uch_sleep.html http://mathcentral.uregina.ca/QQ/database/QQ.09.99/r aeluck1.htmlhttp://mathcentral.uregina.ca/QQ/database/QQ.09.99/r aeluck1.html http://www.mathsisfun.com/data/histograms.html http://www.stat.berkeley.edu/~bradluen/stat2/lecture4. pdfhttp://www.stat.berkeley.edu/~bradluen/stat2/lecture4. pdf http://minney.org/book/export/html/102