The Discriminant Analysis and the Logistic Regression

Introduction

The discriminant analysis and the logistic regression are similar in that both these types of analysis attempt to predict the membership of a case to one of the groups into which the sample is classified by a categorical dependent variable (Warner, 2013). Both of these analyses allow for creating a linear classification model, that is, a model that attempts to predict membership of a case in groups by defining a linear relationship (Pohar, Blas, & Turk, 2004).

We will write a
custom essay
specifically for you

for only $16.05 $11/page
308 certified writers online
Learn More

When should the researcher decide which analysis to perform?

However, these two methods are different in their approach. More specifically, the discriminant analysis requires that several assumptions about the distribution of the independent variables are met, such as the normality of data; on the other hand, the logistic regression does not require such assumptions to be satisfied (Pohar et al., 2004). Also, it should be noted that the logistic regression can only use a dichotomous dependent variable, whereas the discriminant analysis may be run with a dependent variable that has more than 2 levels (University of Exeter, n.d.).

When a researcher needs to decide which analysis to run, the logistic regression is often preferred to the discriminant analysis, due to the relative simplicity of its interpretation in particular (University of Exeter, n.d.). Also, it is recommended to use logistic regression in situations when multiple assumptions of the discriminant analysis are violated (e.g., group sizes are very unequal, there is no multivariate normality, and/or the condition of homogeneity of variance/covariance matrices is not met) (Warner, 2013, p. 1047). On the other hand, the discriminant analysis may permit for obtaining better results when its assumptions are not violated (i.e., it is more powerful), so it may be advised to use the discriminant analysis in this case (Pohar et al., 2004).

Conclusion

Both the discriminant analysis and the logistic regression can be run on the same data in most cases (but not e.g. when the dependent variable has more than 3 groups). However, care should be taken; one ought to choose the method for which the required assumptions are violated minimally (Warner, 2013).

References

Pohar, M., Blas, M., & Turk, S. (2004). Comparison of logistic regression and linear discriminant analysis: A simulation study. Metodoloski Zvezki, 1(1), 143-161. Web.

University of Exeter. (n.d.). Topic 4: Logistic regression and discriminant analysis. Web.

Warner, R. M. (2013). Applied statistics: From bivariate through multivariate techniques (2nd ed.). Thousand Oaks, CA: SAGE Publications.

Get your
100% original paper
on any topic

done in as little as
3 hours
Learn More
Print Сite this

Cite this paper

Select style

Reference

StudyCorgi. (2021, February 5). The Discriminant Analysis and the Logistic Regression. Retrieved from https://studycorgi.com/the-discriminant-analysis-and-the-logistic-regression/

Work Cited

"The Discriminant Analysis and the Logistic Regression." StudyCorgi, 5 Feb. 2021, studycorgi.com/the-discriminant-analysis-and-the-logistic-regression/.

1. StudyCorgi. "The Discriminant Analysis and the Logistic Regression." February 5, 2021. https://studycorgi.com/the-discriminant-analysis-and-the-logistic-regression/.


Bibliography


StudyCorgi. "The Discriminant Analysis and the Logistic Regression." February 5, 2021. https://studycorgi.com/the-discriminant-analysis-and-the-logistic-regression/.

References

StudyCorgi. 2021. "The Discriminant Analysis and the Logistic Regression." February 5, 2021. https://studycorgi.com/the-discriminant-analysis-and-the-logistic-regression/.

References

StudyCorgi. (2021) 'The Discriminant Analysis and the Logistic Regression'. 5 February.

Copy to clipboard

This paper was written and submitted to our database by a student to assist your with your own studies. You are free to use it to write your own assignment, however you must reference it properly.

If you are the original creator of this paper and no longer wish to have it published on StudyCorgi, request the removal.

Psst... Stuck with your
assignment? 😱
Susan
Online
Psst... Stuck with your assignment? 😱
Do you need an essay to be done?
Yes
What type of assignment 📝 do you need?
Yes
How many pages (words) do you need? Let's see if we can help you!
Yes