Correlation

 

ASSIGNMENTS:


T-Test

Practice Problem

Homework Problem


One-Way ANOVA

Practice Problem

Homework Problem


Two-Way ANOVA

Practice Problem

Homework Problem


Correlation

Practice Problem

Homework Problem


Regression

Practice Problem

Homework Problem


Chi Square

Practice Problem

Homework Problem

Practice Problem


Head Size and Shoe Size:  Correlation


Bradley University, Department of Physical Therapy, Spring, 2000

Description: Shoesize and headsize from 130 undergraduate college students were collected.


Number of cases: 130


Variable Names:

  1. 1.Gender:  men(1), women(2)

  2. 2.Shoesize (reported in male sizes)

  3. 3.Headsize (inches)

  4. 4.maleshoe:  male shoe sizes

  5. 5.femshoe:  female shoe sizes

  6. 6.malehead:  male headsizes

  7. 7.femhead:  female headsizes

Download the SPSS dataset:  headshoe.sav


QUESTIONS:

    1. 1.Is there a significant relationship between headsize and shoesize?  If the relationship is significant, report the pearson r coefficient and describe the relationship.

    2. 2.Is there a significant relationship between headsize and shoesize for men?  If the relationship is significant, report the pearson r coefficient and describe the relationship.

    3. 3.Is there a significant relationship between headsize and shoesize for women?  If the relationship is significant, report the pearson r coefficient and describe the relationship.

    4. 4.Obtain scatterplots for questions 1-3.   Explain a possible reason why a significant relationship was not found for every question.


  2. SPSS Instructions

    Correlation

  3. •Open the file.

  4. •Select Correlation (under the "statistics" menu select Correlate then Bivariate)

  5. •A dialog box should appear.  Move your two variables into the "variables" box.

  6. •Hit "ok".


Scatterplot

  1. •Select scatter... (under the "graphs" menu )

  2. •Select "simple" then hit "define"

  3. •Select one variable for the "x axis" and one variable for the "y axis"

  4. •Hit "ok".