4-4 Homework Chapter 5

The probability of being struck by lightning is 0.00037. Find the odds against being struck by lightning. Round your answer to the nearest whole number.

2702 to 1

Refer to the contingency table shown below. A. i. P(S) ii. P(W) iii. P(S / W) iv. P(S / B) v. P(S and W) vi. P(N and B) B. A. Do you see evidence that smoking and race are not independent? C. Why might public health officials be interested in this type of data?

A. 0.2980 0.8050 0.3553 0.0615 0.2860 0.1830 B. YES C. Health officials might target or design special programs based on race.

Over 1,000 people try to climb Mt. Everest every year. Of those who try to climb Everest, 31 percent succeed. The probability that a climber is at least 60 years old is 0.04. The probability that a climber is at least 60 years old and succeeds in climbing Everest is 0.005. A. Find the probability of success, given that a climber is at least 60 years old. Round your answers to 4 decimal places . Probability: B. Is success in climbing Everest independent of age?

A. 0.125 B. NO

1The probability that a student has a Visa card (event V) is 0.60. The probability that a student has a Mastercard (event M) is 0.10. The probability that a student has both cards is 0.06. A. Find the probability that a student has either a Visa card or a MasterCard.Round your answer to 2 decimal places B. In this problem, are V and M independent?

A. 0.64 B. Yes

The probability of an IRS audit is 3.1 percent for U.S. taxpayers who file form 1040 and who earned $100,000 or more. A. What are the odds that such a taxpayer will be audited? Round your answers to the nearest whole number. B. What are the odds against such a taxpayer being audited? Round your answers to the nearest whole number.

A. 1 to 31 B. 31 TO 1

Which pairs of events are independent? a. P(A) = 0.85, P(B) = 0.19, P(A∩B) = 0.18. A and B are b. P(A) = 0.84, P(B) = 0.39, P(A∩B) = 0.34. A and B are c. 0.50, P(B) = 0.30, P(A∩B) = 0.14. A and B are

A. A and B are not independent B. A and B are not independent C. A and B are not independent

1. Currently Samsung ships 21.9 percent of the organic light-emitting diode (OLED) displays in the world. Let S be the event that a randomly selected OLED display was made by Samsung. a. Find P(S). Round your answer to 3 decimal places. b. Find P(S′). Round your answer to 3 decimal places. c. Find the odds in favor of event S. Round your answer to 3 decimal places. d. Find the odds against event S. Round your answer to 2 decimal places.

A. P(S)= 0.219 B. P(S′)= 0.781 C. S= 0.280 D. S= 3.57

1The probability that an international flight leaving the United States is delayed in departing (event D) is 0.31. The probability that an international flight leaving the United States is a transpacific flight (event P) is 0.57. The probability that an international flight leaving the United States is a transpacific flight and is delayed in departing is 0.14. A. What is the probability that an international flight leaving the United States is delayed in departing given that the flight is a transpacific flight? Round your answer to 4 decimal places. B. In this problem, are D and P independent?

A. Probability 0.2456 B. No

This contingency table describes 200 business students. Is major independent of gender?

Yes