Measurement and Statistics_Dasch_Date__031510

Measurement and Statistics_Dasch_Date__031510 - Exploring...

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

View Full Document Right Arrow Icon
Exploring Assumptions (continued) Assumptions of parametric tests - normally distributed data sampling distribution errors in the model Assessing homogeneity of variance - Levene test tests is variance in different groups are the same if significant variances are not equal not significant variances are equal Variance ratio or Hartley’s F - with 2 or more groups - VR = largest variance/smallest variance - If VR < 2, homogeneity can be assumed - table 5.12 in table Transformations must be applied to every variable (READ SECTION IN BOOK) - log transformation log(x) correct for: positive skew, unequal variances - square root transformation SQUAREROOT(x) correct for: positive skew, unequal variances - reciprocal transformation (1/x) corrects for: positive skew, unequal variances
Image of page 1

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

View Full Document Right Arrow Icon
- reverse score transformation corrects for: negative skew SPSS K-S test: analyze descriptive stats
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