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Exam 7: Probability

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Question 61

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Use the following information for questions: Of the residents of the U.S., 43% live in Northeast/Midwest region while the remaining 57% live in the South/West region. Of the residents in the Northeast/Midwest region, 14% are senior citizens, while the corresponding value for the South/West region is 12%. A citizen will be selected at random. -What is the probability that the person will be a senior citizen?

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Question 62

Multiple Choice

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Use the following information for questions: A card is drawn at random from a standard 52-card deck. -The conditional probability that the card is a 2 given that a 2 or a 3 was drawn is

A) 20.0% (1/5)
B) 25.0% (1/4)
C) 33.3% (1/3)
D) 50.0% (1/2)

E) A) and B)
F) A) and C)

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Question 63

Multiple Choice

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Use the following information for questions: A student is randomly selected from a large college. Define the events C = {the student owns a cell phone} and I = {the student owns an iPod}. -Suppose you know that your friend's sister, who attends this college, owns a cell phone and you are wondering what would be the chance that she owns an iPod. What type of probability would this be?

Use the following information for questions: When a fair coin is flipped 6 times, the probability of getting an odd number of heads(1, 3, or 5) is 0.5. -The probability of getting more than 3 heads is 0.344, and the probability of getting 5 heads is 0.094. What is the probability of getting either an odd number of heads or more than 3 heads?

Use the following information for questions: When a fair coin is flipped 6 times, the probability of getting an odd number of heads(1, 3, or 5) is 0.5. -What is the probability of getting an even number of heads (0, 2, 4, or 6)?

Use the following information for questions: For each situation, decide if the probability described is a subjective (personal) probability or a relative frequency probability. -A college basketball player has made 53% of his shots from 3-point range. The probability that he will make a 3-point shot, 53%, is a

Use the following information for questions: A student is randomly selected from a large college. Define the events C = {the student owns a cell phone} and I = {the student owns an iPod}. -Which of the following is the correct interpretation of the probability P(I|C) ?

Use the following information for questions: Of the residents of the U.S., 43% live in Northeast/Midwest region while the remaining 57% live in the South/West region. Of the residents in the Northeast/Midwest region, 14% are senior citizens, while the corresponding value for the South/West region is 12%. A citizen will be selected at random. -What is the probability that the person will be from the Northeast/Midwest region, given that he/she is a senior citizen?

Use the following information for questions: For each situation, decide if the probability described is a subjective (personal) probability or a relative frequency probability. -Among 5000 new tires sold by a tire company, 20% (1000/5000) lasted more than 100,000 miles. The 20% chance that a new tire will last more than 100,000 miles is a

Use the following information for questions: A student is randomly selected from a large college campus. Define the eventsH = {the student has blond hair} and E = {the student has blue eyes}. -The events H and E are

Use the following information for questions: In the past five years, only 5% of pre-school children did not improve their swimming skills after taking a Beginner Swimmer Class at a certain Recreation Center. -The probability of 5% that a pre-school child who is taking this swim class will not improve his/her swimming skills is a

Use the following information for questions: A football player is randomly selected from all NCAA Division I college teams. Define the events D = {the football player plays defense} and T = {the football player is over 6 feet tall}. -Refer to question 36. Suppose that we also know that of all NCAA Division I football players, 15% are shorter than 6 feet. What do we know about events D and T?