1. Quiz # 4(A)1. Why we study measures of dispersion?2. Which measure of dispersion is the best? Why?3. Why we study coefficient of variation (CV)?4. Find the variance of first 11 natural numbers?5. Find the two numbers whose AM=7 and SD=1.6. If SD=7 and CV=28%, then find the AM.7. Find the MD and SD of the numbers 0, 1,2,3,4.Md. Mortuza Ahmmed