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Writing Good Hypotheses

Writing Good Hypotheses. Differentiate between the independent and dependent variable. Write a hypothesis that includes and independent variable, dependent variable, and prediction. What are our two variables?. Independent Dependent. Independent - the factor that is manipulated.

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Writing Good Hypotheses

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  1. Writing Good Hypotheses Differentiate between the independent and dependent variable. Write a hypothesis that includes and independent variable, dependent variable, and prediction.

  2. What are our two variables? • Independent • Dependent • Independent- the factor that is manipulated. • Ask yourself: “What did we do?” • You control this variable • Dependent- the measurement that is taken or the data that is collected in the experiment. • Ask yourself: “What did we measure?” • You observe or measure this variable

  3. There are two parts to a good hypothesis • The IF part • The Thenpart • The IFpartshows the relationship between the two variables. • We are investigating relationships, not cause and effect! • The THENpartshows your prediction. Remember, a hypothesis is a testable statement which may include a prediction.

  4. Example #1 If I play the lottery, then I will get rich • Is there a relationship? • Is there a prediction? If the chance of winning is related to the number of lottery tickets, then people who buy more lottery tickets will have a better chance of winning.

  5. Example #2 Ultraviolet light may cause skin cancer • Is there a relationship? • Is there a prediction? If skin cancer is related to ultraviolet light, then people with a high exposure to UV light will have a higher frequency of skin cancer.

  6. Every hypothesis: If… Dependent is related to Independent, thenPrediction

  7. Try revising these bad hypotheses: Chocolate may cause pimples. Salt in soil may affect plant growth. Bacterial growth may be affected by temperature. Temperature may cause leaves to change color.

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