Question

the file blood.csv, has two columns: Type (for blood type), and Disease (either yes or no), which is data taken from a random sample from a particular area. Use R and this data to answer the following questions:

State the appropriate null hypothesis for testing if having this particular disease is independent of blood type.

State the appropriate alternative hypothesis for testing if having this particular disease is independent of blood type.

Find the test-statistic

Find the p-value

State your conclusion in terms of the problem, assuming
α 0.01

Were blood type A individuals more or less likely to have the disease than what we expected if the null was true?

Were blood type O individuals more or less likely to have the disease than what we expected if the null was true?

Which group contributed most to the value of the test-statistic?

blood.csv:

A, yes x 140

B, yes x 60

AB, yes x 10

O, yes x 7

A, no x 499

B, no x 222

AB, no x 20

O, no x 223

Answer 1