*Testing of Hypothesis*

*Testing of Hypothesis*

The researcher is similar to the *prosecuting attorney* is the sense that the researcher brings the null hypothesis “to trial” when she believes there is probability strong evidence against the null.

- Just as the prosecutor usually believes that the person on trial is not innocent, the researcher usually believes that the null hypothesis is not true.
- In the court system the jury must assume (by law) that the person is innocent until the evidence clearly calls this assumption into question; analogously, in hypothesis testing the researcher must assume (in order to use hypothesis testing) that the null hypothesis is true until the evidence calls this assumption into question.