Some people who have heart attacks do not experience chest pain, although most do. A study of people admitted to emergency rooms with heart attacks compared the death rates of people who had chest pains with those of people who had less typical symptoms. Of the 19,118 people who had heart attacks with chest pain, 822 died.

Perform a hypothesis test to determine whether having chest pains during a heart attack is related to the likelihood of death and write your conclusions. Use a 0.001 level of significance.

Observed

Survive

Die

Total

Pain

18296

822

19118

No pain

1534

229

1763

Total

19830

1051

20881