Question

3-2 Fundamentals criterion commonly used in inferential statistics, but the value of 0.05 is not absolutely rigid, and other values such as 0.01 are sometimes used instead) 9. Probability of a Wrong Result Table 3.-1 shows that among 85 women who were pregnant, the test for pregnancy yielded the wrong conclusion 5 times. a. Based on the available results, find the probability of a wrong test conclusion for a woman who is pregnant b. Is it "unusual" for the test conclusion to be wrong for women who are pregnant? 10. Probability of a Wrong Result Table 3-1 shows that among 14 women who were not pregnant, the test for pregnancy yielded the wrong conclusion 3 times. a. Based on the available results, find the probability of a wrong test conclusion for a woman who is not pregnant. et preg- nant? 11. Smoking Survey In one Gallup poll, 1038 adults were asked about the effects of sec- ondhand smoke, and 52 of them indicated that the effects are "not at all harmful a. If you randomly select one of the surveyed adults, what is the probability of get ting someone who feels that secondhand smoke is not at all harmful? b. Is it "unusual" for someone to believe that secondhand smoke is not at all harmful? 12. Cholesterol Reducing Drug In a clinical trial of Lipitor, a common drug used to lower cholesterol, one group of patients was given a treatment of 10 mg Atorvastatin tablets. That group consists of 19 patients who experienced flu symptoms and 844 pa- tients who did not (based on data from Pfizer, Inc.). a. Estimate the probability that a patient taking the drug will experience flu symp- toms. b. Is it "unusual" for a patient taking the drug to experience flu symptoms? 13. Bumping Airline Passengers In a recent year, 2624 American Airlines passengers were involuntarily denied boarding their flights, and 168,262 other passengers volun- teered for bumping in exchange for cash or vouchers. a. Estimate the probability that a randomly selected bumped American Airlines pas- senger is one who was involuntarily bumped. b. Are involuntary bumpings "unusual" ? 14. On-Time Flight Arrivals A study of 150 randomly selected American Airlines flights showed that 108 arrived on time (based on data from the Department of Transporta- tion). a. What is the estimated probability of an American Airlines flight arriving late? b. Is it "unusual" for an American Airlines flight to arrive late? 15. Guessing Birthdays On their first date, Kelly asks Mike to guess the date of her birth, not including the year. a. What is the probability that Mike will guess correctly? (Ignore leap years.) b. Would it be "unusual" for him to guess correctly on his first try? c. If you were Kelly, and Mike did guess correctly on his first try, would you believe his claim that he made a lucky guess, or would you be convinced that he already d. If Kelly asks Mike to guess her age, and Mike's guess is too high by 15 years, what 16. Lottery In the old New York State Lottery, you had to select six numbers between l knew when you were born? is the probability that Mike and Kelly will have a second date? and 54 inclusive. There were 25,827,165 different possible six-number combinations,

Needs help with 9-15 ezpecially 9,11,13,15

Answer 1

13:

Total number of passengers:

Total number of passengers: 2624 + 168262 = 170886 (A) Out of 170886 passengers, 2624 involuntarily bumped so required probability is2624/170886 = 0.0154 (B) Yes it is unusual because above probability is less than 0.05.

(A)

Out of 170886 passengers, 2624 involuntarily bumpbed so required probability is

2624 / 170886 = 0.0154

(B)

Yes it is unusual because above probabilityis less than 0.05.