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# How to Develop a Science Project (page 5)

Centreville Middle School Science Fair
Updated on Sep 28, 2011

### Step 10: Making a Data Table

The key to starting to interpret or analyze your data is a good Data Table. A good table should have the following parts:

• Title
• Column (Variable) Titles
• Units listed for each variable

Note: Use a computer spreadsheet to make a table. It is already arranged in columns and rows. You can then graph from the spreadsheet, and you can cut and paste the table into a word processing document.

#### Basic Format:

##### Sample Table

Effect of Temperature on Plant Growth

 Temperature Plant Growth (oC) (cm) 10 14.2 15 15.7 20 17.1 25 18.9

### Step 11: Analyzing your Data

When organizing data into tables and graphs, always be sure to label columns/axes correctly and include units of measurement.

• Organize data into a table.
• Find appropriate measure of central tendency: mean, median, mode.
• Select correct graph(s) to display what you want to show:
• Bar graph for comparing 2 - 4 independent groups.
• Line graph if the independent variable is numerical, and a trend (upward or downward) is indicated.
• Circle Graph (pie chart) if graphing parts of a whole (percentages).
• Scatterplot (x-y graph) when you are trying to show a possible relationship between 2 variables.
• Box and whisker plot to show distribution of data within each group.