Question text

A researcher wants to test whether smoking and drinking alcohol are independent, at of 5%. He took a random sample of adults and calculated the following standardized residuals.

Drink's alcohol		Smoker
Yes	No
Yes	0.85	1.92
No	-8.89	0.99

Using this table, which of these values shows the greatest relative difference between the observed and expected cell frequencies?

Please give your answer correctly rounded to two decimal places.