Covid-`9 Analysis : Mexico & Chile

Table showing with Covid-19 confirmed cases  with Recoveries in Chile  and Mexicoas on July 22, 2020

As on July 22, 2020
	Confirmed		REcovered
	Cases		Cases
Chile	334,683		306,816
Mexico	356,255		227,165
Source:  Worldometer

Let p₁ and p₂ be the proportion of recoveries to confirmed cases of Covid-19.

We set Null Hypothesis H₀: p₁ = p₂                                                                                                                                                                             Then the Alternative Hypothesis is H_1:: p₁ # p₂      

We have, p = (n₁p₁+n₂p₂)/(n₁+n₂) and S.E. of (p₁-p₂) = √(pq)(1/n₁+1/n₂)

                                                Z = |p₁-p₂|/S.E. of (p₁-p₂) 

n1=	334,683		p1=	0.916736		1/n1=	2.9879E-06
n2=	356255		p2=	0.637647		`/n2=	2.80698E-06
a1=	306,816			p=	0.773	q=	0.227
a2=	227165				√pq(1/n1+1/n2)=		0.00100864
1/n1+1/n2	5.79488E-06			|p1-p2|=	0.279089
			z =	276.70

Z = 2.58 at 1% level of significance. As z(obs) = 276.70, the Null Hypothesis is rejected

It is concluded that the Recovery rate due to Covid-19 is significantly higher in Chile than in Mexico.