i dont know help.
I'm not sure what kind of data you are mentioning to, but i'm sure pie charts, graphs, tables and such diagrammatic representation are the most effective methods to analyze and communicate data. Since graph, pie charts and tables are three different methods of analyses you could consider them as three examples for the task.
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Thermometer, Spring Scale, and a Balance Scale ;-) Math Homework... Suckie! :P
data
No, it is not suitable for nominal data.
tools for collecting scientific data....one tool for recording,collecting, and analyzing data is a microscope :)))
1. Define the question 2. Gather information and resources (observe) 3. Form hypothesis 4. Perform experiment and collect data 5. Analyze data and interpret data 6. Draw conclusions that serve as a starting point for new hypothesis 7. Communicate results