Coefficient of Variation

Topic: Coefficient of Variation
Student Name: Seema
Class: B.Ed. 2.5
Project Name: “Young Teachers' Professional Development (TPD)"
"Project Founder: Prof. Dr. Amjad Ali Arain
Faculty of Education, University of Sindh, Pakistan

1. Faculty Of Education University Of Sindh Name: Seema Soomro Roll # 2k17/BEDSM/51 Topic:Coefficient of variation Assign by: Dr Amjad ali Arain

2. What is coefficient of variation? The coefficient of variation (CV) also known as Relative standard deviation is the ratio of the Standard deviation to the mean.

3. Coefficient of variation Just divide the standard deviation by the mean and multiply Times 100. Computing the coefficient of varia tion the formula of coefficient of variation is Coefficient of variation =(standard deviation) / mean 100

4. For Example A reasearcher is compairing two multiple choices test with different conditions, in the first test, a typical multiple choice Test is administered . In the second test, alternative choices are randomly assigned To test takers, the results from the two test Regular test Randomized answers Mean 59.9 44.8 SD 10.2 12.7 CV 17.03 28.35

5. Conti….. Look at the standard deviation of 10.2 and 12.7, You might think that the test have similar results. However, when you adjust for the difference in the In the mean, the results have more significance.

6. Example: Coefficient of variation CV = SD/mean by 100 Class A Class B Average score 90 80 Standard deviation 3 2 Which class is consistent in scoring run CV a = SD/mean\multiply 100 =3/90 by 100 = 3.33. CV b = SD/mean\multiply 100 = 2/80 by 100 = 2.5.

7. Interpretation Class B is consistent against Class A as CV of class B is less.

8. THANK YOU