Chapter 3. Probability

Chapter 3: Probability 65number of ways correct October birthday can occur 31b. P ( correct) == = 0. 0849number of different days365number of ways birthday ends in y 7c. P ( correct) == = 1. 000number of different days in week 714. Probability of a Car Crashnumber of times 20 - 24 year old is in car crash 136P ( in car crash) == = 0.340number of drivers observed in sample 400While we don’t have the probabilities for other age groups, it would be reasonable to conclude that thisprobability is high enough to be of concern to 20-24 year olds.15. Probability of an Adverse Drug Reactionnumber of times headache occurred 117 117P ( headache) == = = 0.159number of times patients observed 117 + 617 734Yes, this probability of about 16 times out of 100 patients would be of concern to many Viagra patients.16. Gender of Children: Constructing Sample Spacea. Possible Outcomes: girl-girl, girl-boy, boy-girl, boy-boynumber of ways both girls can occur 1b. P ( both girls) == = 0. 250number of different possible outcomes 4number of ways one of each sex can occur 2c. P ( one of each sex) == = 0. 500number of different possibleoutcomes 417. Genetics: Constructing Sample Space, both with blue-brown, brown dominanta. Possible Outcomes, blue-blue= blue, blue-brown= brown, brown-blue= brown, brown-brown= brownnumber of ways blue eyes can occur 1b. P ( blue) == = 0. 250number of different possible outcomes 4number of ways brown eyes can occur 3c. P ( brown) == = 0. 750number of different possible outcomes 418. Genetics: Constructing Sample Space, one with brown-brown and one with brown-blue, brown dominanta. Possible Outcomes, brown-brown= brown, brown-blue= brown, brown-brown= brown, brown-blue=brownnumber of ways blue eyes can occur 0b. P ( blue ) == = 0. 000number of different possible outcomes 4number of ways brown eyes can occur 4c. P ( brown) == = 1. 000number of different possible outcomes 4