1. Numbers in Science

2. Why Do We Collect Data? We collect data to analyze test results, calculate averages, compare our data with other sets of data, and to prove our hypothesis Data is collected, organized, and represented in a meaningful way by making graphs.

3. What is an Average? An average is the total measured amount divided by the number of trials. TrialYards Thrown 130 245 313 Avg.29.3

4. How did we find it? TrialYards Thrown 130 245 313 Avg.29.3 30 +45+13 = 88 88/3 = 29.3 to find the %, multiply by 100 29.3%

5. Using Tables to Organize Data Tables are the most practical way to organize your data It makes the numbers easier to read and makes graphing your data easier

6. Graphing Data Data can be visualized using graphs Three main types of graphs Bar Graph Line Graph Pie Graph

7. Bar Graphs Numerical values are represented by the height of a “bar” MonthNumber of Scoops Sold May54 June120 July342 August220 September48 We can turn this table of data into a bar graph

9. Line Graphs

10. Pie Charts Use a pie chart to display percentages

11. Graphs and Tables Cont. Graphs and tables should ALWAYS contain a title and axis labels Keep is simple and to the point

12. Is My Data Accurate? To determine if your data is accurate you must think about how you conducted the experiment Was there anything that could have thrown off your data? Environment User error Precision of instruments