Lecture 6. univariate and bivariate analysis

this session differentiates between univariate, bivariate, and multivariate analysis. it covers practical assessment of table of critical values and understanding of the degree of freedom

1. Univariate and Bivariate Analysis Dr. Rajeev Kumar , M.S.W (TISS, Mumbai), M.Phil. (CIP, Ranchi), UGC-JRF, Ph.D. (IIT Kharagpur) Visiting Faculty, RKMVERI, Ranchi Lecture-6: Research Methodology (Descriptive and inferential statistics

2. After data collection We need to define the type of variables from the collected data. Based on the type of variables, we choose the appropriate statistical analysis

3. Types of statistical analysis

4. Univariate analysis Descriptive analysis

5. Bivariate analysis Analytical statistics

6. Multivariate analysis

7. How to interpret the statistical result? Few examples How the statistical results are displayed?

8. Display of sociodemographic profile (categorical variables)

9. Second example of descriptive data

10. Tables from research articles https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3105560/

11. Bivariate data

12. How to read these tables We have to understand W hat is DF (degree of freedom? What is your ά alpha value? What is p ( probability)? What is the critical value? What is the test value ?

13. What is df Degree of freedom: The number of observation, which are free to vary or change.

14. Df for chi square

15. Table of critical values (Chi square)

16. What is our alpha value?

17. Now find out if your result is significant?

18. Exercise-1 Please find out the DF (degree of freedom) If one table has 5 column and 3 rows= If table has 3 rows and 4 column = If 3 column and 2 rows= 3 column and 3 rows= 2 column and 2 rows=

19. Exercise-2 In one chi square analysis, df =2, Chi square χ 2 = 4.03, tell me if this result is significant at .05? Whether this result is significant at .01 and .001? In one survey the result of pass and fail was compared between male and female candidates, the chi square result reveals, df =1, χ 2 =1.89 now find out, whether this result is significant at p ≤0.05, p ≤ 0.01, and p ≤0.001 In a chi square result, in the table, there were 4 columns and 4 rows. Calculate its degree of freedom. The test value of χ 2 = 45.88, please evaluate this result at p ≤0.05, p ≤ 0.01, and p ≤0.001

20. Use this table again

21. Exercise-3: Now evaluate the chi square results

22. Thanks for your attention keep learning!!!