A car insurance company has determined that 7 of all drivers were involved in a car accident last year. Among the 14 drivers living on one particular street, 3 were involved in a car accident last year.
If 14 drivers are randomly selected, what is the probability of getting 3 or more who were involved in a car accident last year?
A) 0.0562 B) 0.0698 C) 0.9438 D) 0.4318
Q. 2A person's blood type can be classified as A, B, AB, In this example, blood type is the variable while A, B, AB, O constitute the data.
A) True B) False
Q. 3n = 61, x = 22; 95 level
A) 0.271 to 0.467 B) 0.252 to 0.486 C) 0.248 to 0.490 D) 0.267 to 0.471
Q. 4The participants in a television quiz show are picked from a large pool of applicants with approximately equal numbers of men and women. Among the last 10 participants there have been only 2 women.
If participants are picked randomly, what is the probability of getting 2 or fewer women when 10 people are picked?
A) 0.0537 B) 0.0547 C) 0.0439 D) 0.0107
Q. 5A variable which can take any real-number value in the interval 0, 1 is a continuous variable.
A) True B) False
Q. 6The probability that a football game will go into overtime is 18. In 140 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime?
A) mean: 25.2; standard deviation: 5.01996016 B) mean: 25.2; standard deviation: 4.54576726
C) mean: 23.8; standard deviation: 4.54576726 D) mean: 23.8; standard deviation: 5.01996016
Q. 7In distributions that are skewed to the left, what is the relationship of the mean, median, and mode?
A) mean > median > mode B) mode < mean < median
C) mode > mean > median D) mode > median > mean
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