Question

A study was conducted to find out whether malaria infection rates in the Amazon differed by region. You use the chisq.test function with these data.

	Region
Infection	east	central	west
Yes	5	10	7
No	50	30	47

Pearson's Chi-squared test

data: infect

X-squared = 4.8759, df = 2, p-value = 0.08734

What are your decision and conclusion (in terms of the populations studied) from the R output (a= 0.05)?

Answer 1

Null hypothesis : Ho malaria infection rates in the Amazon are not differed by region

Alternative Hypothesis : H1: malaria infection rates in the Amazon differed by region

Given,

: level of significance = 0.05

p-value = 0.08734

Decision

As p-value : 0.08734 >   : level of significance : 0.05; Fail to reject the null hypothesis : Ho

Conclusion :

At 0.05 level of significance , there is not sufficient evidence to conclude that malaria infection rates in the Amazon differed by region