Question: A psychologist is studying the effects of high blood pressure (i.e., hypertension) on memory and learning. He uses a task that requires a person to study six digits on a screen and then later

to indicate whether a single digit presented on the screen was part of the original set. Previous

research has shown that the average time to answer for adults with normal blood pressure on the six digit task is 1.5s with a standard deviation of .25s. He believes that hypertensives will answer more slowly than people with normal blood pressure.

a) Create a null and alternative hypothesis:

Ho: HI: _

b) Sketch out the sampling distribution and indicate the following parts: acceptance region, rejection region, z-critical value or values assuming alpha= .05.

c) State in words what it would mean if a Type I error was committed.