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# How should you formulate a hypothesis?

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According to Evergreen Public Schools, the way to formulate a measurable hypothesis is to create an if, then and because statement in relation to two variables. According to Wesleyan University’s Government Department, the four types of possible hypotheses to create are correlations, causal, directional and null. The type of hypothesis alters the formulation of the hypothesis.

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A hypothesis is an observation about the way in which an entity works or behaves. A hypothesis is a proposed relationship that says that if the independent variable behaves in a certain way, then the dependent variable changes in a repeatable way because of a specific relationship. A null hypothesis states that one variable does not have a correlation or causal effect with another variable. A correlation hypothesis states that there is a relationship between the variables, but it is unknown which variable changes the other variable. A directional hypothesis accounts for this change with the addition of a possible positive, negative or negligible relationship between variables. A causal hypothesis explains that an independent variable or variables directly cause the dependent variable in a study. The causal hypothesis includes the “because” statement in the hypothesis.

A hypothesis must be testable to be valid. Researchers construct strong hypotheses after exploration of literature on a topic under consideration before asserting a new relationship.

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## Related Questions

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Some good hypothesis examples include, "When there is less oxygen in the water, rainbow trout suffer more lice" and, "Aphid-infested plants exposed to ladybugs have fewer aphids after a week than untreated plants." Effective hypotheses are simple enough to be testable, but not so simple that they are common knowledge.

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There are seven steps to an investigatory project: ask a question, conduct the research, form a hypothesis, design an experiment, analyze the results, draw a conclusion and communicate the results. The steps to an investigatory project are often referred to as the scientific method.

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A logical written argument in an essay requires a thesis statement, proof that the material was understood by the writer and an ability to apply this material beyond the basic definition or facts already known. Arguing is the ability to express a point of view on a subject and support that point with evidence.