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

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.