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Question 4

In a national survey, college students were asked, "How often do you were a seat belt when riding in a car?" The response frequencies appear in the table below.

What is the probability that a survey participant does NOT always wear a seat belt when riding in a car?

Response	Frequency
Never	115
Rarely	335
Sometimes	550
Most of the Time	1100
Always	2900

Question 4 options:

	a) 0.58
	b) 0.71
	c) 0.42
	d) 0.29

In a medical study of 605 heart attack survivors, some were randomly assigned to a group that followed a diet recommended by the American Heart Association (AHA) and some were randomly assigned to a group that followed the Mediterranean Diet. After four years, the number of patients who died from heart disease, did not die from heart disease but developed another serious illness, or were healthy was recorded.

	Died from Heart Disease	Developed Another Illness	Healthy After Four Years	Total
AHA Diet	24	40	239	303
Mediterranean Diet	14	15	273	302
Total	38	55	512	605

What is the probability that a randomly selected survey participant followed the AHA diet? Round to three decimal places.

Question 5 options:

	a) 0.501
	b) 0.040
	c) 0.499
	d) 0.623

6 ) In a medical study of 605 heart attack survivors, some were randomly assigned to a group that followed a diet recommended by the American Heart Association (AHA) and some were randomly assigned to a group that followed the Mediterranean Diet. After four years, the number of patients who died from heart disease, did not die from heart disease but developed another serious illness, or were healthy was recorded.

	Died from Heart Disease	Developed Another Illness	Healthy After Four Years	Total
AHA Diet	24	40	239	303
Mediterranean Diet	14	15	273	302
Total	38	55	512	605

What is the probability that a randomly selected survey participant was healthy after four years? Round to three decimal places.

Question 6 options:

	a) 0.846
	b) 0.512
	c) 0.467
	d) 0.154

Question 7

In a medical study of 605 heart attack survivors, some were randomly assigned to a group that followed a diet recommended by the American Heart Association (AHA) and some were randomly assigned to a group that followed the Mediterranean Diet. After four years, the number of patients who died from heart disease, did not die from heart disease but developed another serious illness, or were healthy was recorded.

	Died from Heart Disease	Developed Another Illness	Healthy After Four Years	Total
AHA Diet	24	40	239	303
Mediterranean Diet	14	15	273	302
Total	38	55	512	605

What is the probability that a randomly selected survey participant developed another illness AND followed the AHA diet? Round to three decimal places.

Question 7 options:

	a) 0.066
	b) 0.727
	c) 0.132
	d) 0.526
	e) 0.592

Answer 1

let , 4) P (always rear seat belt) 2900 5000 0:58 P[ not always wearing). 1- PCalways wearing seat belt). seat belt S | 0:58 10.42 5) P(AHA) 303 605 -10.50) 6) Plafter 4 years) 512 605 01846 7) P(ell n AHA) 0.066 40 605