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How can I write a hypothesis about teen pregnancies and completing high school?

A hypothesis is the stated relationship between variables and is the first step in testing the validity of a theory.  It is based on observations made regarding the independent and dependent variables.  The independent variable is the behavior that may be manipulated or changed.  The independent variable affects the dependent variable.  In this example, your independent variable would be whether or not a teen is pregnant.  The dependent variable is the resulting behavior of the independent variable, in this case, whether or not a teen completes high school.  A hypothesis must be testable and measurable.  “Teen pregnancy increases the high school completion rate of teenagers” or “Teen pregnancy decreases the high school completion rate of teenagers” would both work as a hypothesis for this study.  When testing a theory, you would also want to include a null hypothesis.  A null hypothesis shows that there is no significant relationship between the variables.  A null hypothesis for this study could state “Teen pregnancies result in no significant difference in the high school completion rate of teens.”

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