Analyzing Data & Drawing Conclusions

1. Analyzing Data & Drawing Conclusions Lt1.4a & b

2. Analyzing a Line Graph • Discuss changes in data over time or trends in data • Discuss the ranges in the data • Indicate high and low spots in data

3. Analyzing a Bar Graph • Discuss comparisons in the data • Discuss ranges in the data • Indicate high and low points in the data

4. Analyzing a Pie Graph • Discuss percentages shown • Discuss ranges in the data • Indicate high and low points in the data • www.fedstats.gov/kids/mapstats/graphics/pie.gif

5. Analyzing a Scatter Plot • Discuss how strong the relationship is between the variables • Discuss if the relationship is direct or inverse • Indicate high and low points in the data (Pick from graph and discuss!) Relationship is strong because it is far from 0 and many points lie along the line.. Relationship is inverse because it is a negative value and line has a negative slope.

6. In general when analyzing graphs… • Pretend you are talking to someone younger • Explain to them what the data actually means Example: *The relationship is weak which means that thumb circumference does not influence the # of wins you will get. * The relationship is inverse which means that the number of wins decreases as the thumb circumference increases.

7. Sources of Error-Part of Analysis • Discuss errors within the experiment (due to poor set-up, etc.) • Discuss errors related to measurements taken (poor techniques, etc.) • Do not blame errors on not measuring correctly or a bad measurement device!

8. Drawing Conclusions from Data *Go beyond analysis to find out what is behind the data (Games on Tuesdays & Fridays-so less time is spent on internet) *Use data to support (1 hour was spent on the internet on Tuesdays & Friday compared to at least 1.5 hours for every other day)

9. Analyze the following graph