4. To help consumers make informed decisions about health care, the government releases data about patient outcomes in hospitals. You want to compare Hospital A and Hospital B, which serve your community. Here are data on all patients undergoing surgery in a recent time period. The data include the condition of the patient ("good" or "poor") before the surgery. "Survived" means that the patient lived at least 6 weeks following surgery.

Good Condition
	Hospital A	Hospital B	Total
Died	6	9	15
Survived	594	591	1185
Total	600	600	1200

Poor Condition
	Hospital A	Hospital B	Total
Died	56	9	65
Survived	1444	191	1635
Total	1500	200	1700

Answer parts (a) through (c).

4(a).

Condition (good or poor) is [ Select ]

[-"the response variable",

-"the explanatory variable",

-"the blocking variable"] .

Hospital (A or B) is [ Select ]

[-"the response variable",

-"the explanatory variable",

-"the blocking variable"] .

Outcome (died or survived) is [ Select ]

[-"the blocking variable",

-"the explanatory variable",

-"the response variable"] .

4(b) Which hospital has higher survival rate for the patients in poor condition? Justify your answer. Round your percentages to one decimal place.

Hospital____ has higher survival rate for the patients in poor condition since for Hospital A the survival rate is____%,

and for Hospital B the survival rate is____%.

4(c) The local paper reports just these overall survival rates. Which hospital has the higher rate? Justify your answer. Round your percentages to one decimal place.

Hospital____ has higher survival rate for all patients since for Hospital A the survival rate is____%,

and for Hospital B the survival rate is____ %.