Res/341 Test with Answers

1. A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developed breast cancer. According to the American Cancer Society, one in twelve women will develop breast cancer at some time in her life. Of the numbers mentioned, which are parameters?

A. 13% and one in twelve

B. 79% and one in twelve

C. 79% and 500 days

D. 13% and 79%

2. Which of the following is an example of statistical inference?

A. Calculating the mean number of fruit trees damaged by Mediterranean fruit flies in California last year

B. Calculating the amount of fly spray needed for your orchard next season

C. Calculating the mean age of patients discharged from hospitals in New York State in 1997

D. Counting the number of patients who file malpractice suits after being discharged from hospitals in New York State

3. The Information Commons in the main library has 150 personal computers. The probability that any one of them will require repair on a given day is 0.02. To find the probability that exactly 25 of the computers will require repair, one would use what type of probability distribution?

A. Poisson distribution

B. Binomial distribution

C. Normal distribution

D. Hypergeometric distribution

4. Ten bolts were selected randomly from a production line and the diameter of each was measured. Why do these diameters not have a binomial distribution?

A. The diameters of the bolts are not independent of one another

B. They have equal probability of success

C. Diameter is a continuous random variable

D. They do have a binomial distribution

5. Which of these parameters associated with a binomial experiment will produce a probability distribution with the smallest standard deviation; given n is the same for each situation?

A. p = 0.4

B. p = 0.5

C. p = 0.3

D. (1- p) = 0.1

6. The use...