{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

11-19-08 - Psychology 206 Class Notes What is good about...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Psychology 206 – Class Notes – 11/19/08 What is “good” about one-tailed (directional) hypothesis tests? o With one tailed test, you would reject the null hypothesis compared It’s slightly more likely that you would reject a null hypothesis (more accurate) With a one tailed test, you have a greater power to detect an effect if your Z is not large – you will be able to reject the null hypothesis What is “bad” about one-tailed (directional) hypothesis tests? o If you are totally wrong about your hypothesis o If you make a 1-tailed test, you can miss an effect entirely (it could be on the opposite side) A treatment could be making a patient better, but it might be harming the patient worse (other end of the distribution) It is for this reason why we DO NOT typically use 1-tailed tests! Exercises #25 and #26 Problems with wording of null hypothesis: - The mean of the population of body temperatures of students… - The mean of the population of cost per mile…
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern