Question

Recently there was a study interested in a relationship between covid-19 and blood type. The following table outlines the data gathered from a hospital in Wuhan used in the study. The patients were separated by two variable, whether or not they were infected, and their blood type. At = 0.01, test the hypothesis that the variables are independent.

Infected	670	469	178	458
Not infected	1188	920	336	1250

Type of blood A B AB O

A. state the Ho and Ha

B. Check the assumptions ti perform the test

C. Find the test statistic and decide to reject or fail the hypothesis

D. Conclue in context.

Answer 1