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Exercise 2: Testable Observations
Determine which of the following observations are testable. For those that are testable:
Determine if the observation is qualitative or quantitative
Write a hypothesis and null hypothesis
What would be your experimental approach?
What are the dependent and independent variables?
What are your controls - both positive and negative?
How will you collect your data?
How will you present your data (charts, graphs, types)?
How will you analyze your data?
Observations
1. A plant grows three inches faster per day when placed on a window sill than it does when placed on a on a coffee table in the middle of the living room. When a plant is placed on a window sill, it grows three inches faster per day than when it is placed on a coffee table in the middle of the living room. Hypothesis: If a plant is place in a window sill, it grows three inches faster per day than when it is placed on a coffee table in the middle of the living room. Experimental approach: Observation Dependent Variables: Independent Variables: Each plant is given the same amount of nutrients and water. Control group: Amount of soil, nutrients and water added Data collection: Number of times each plant is watered and time length of experiment. Data Presentation: Bar graph Analyze your data: Lab report
2. The teller at the bank with brown hair and brown eyes is taller than the other tellers. Not testable
3. When Sally eats healthy foods and exercises regularly, her blood pressure is 10 points lower than when she does not exercise and eats fatty foods. Hypothesis: Eating healthy and exercising regularly, could lower your blood pressure by 10 points. Experimental approach: review data collected and compare notes. Dependent

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