What is the purpose of a chi-squared test?
To determine if the entire crosstab model is significant or not. Whether the null can be rejected
Assymetrical measure
Reports different measures of strength depending on which variable is assumed to cause the other
Symmetrical measure
Reports the same measure regardless of which variable is assumed to cause the other
Which type of measure is preferred?
Asymmetrical measures
PRE measure
Extent to which the values of the IV predict the values of the DV. Association measured between -1 and 1.
What two measures of association are used for nominal data?
Lambda and Cramer’s V
What measure of association is used for ordinal-ordinal data?
Somer’s d
What is the problem with using lambda?
Lambda is not consistent with low distribution
What kind of measure is Cramer’s v?
non-PRE & asymmetrical
Where is Cramer’s v useful
evaluating controlled comparisons
What kind of measure is lambda?
PRE
when is somer’s d positive
if increasing codes of IV is associated with increasing codes of DV
when is a regression analysis used?
when the DV is interval & IV is any variety
Pearson’s r
correlation coefficient measures the strength and direction of the relationship between 2 interval variables.
