a. all three flips are heads?
b. the first is a head or the second is a head?
c. you get two heads?
d. you get two heads given that the first is a head?
e. the second is a head given the first is a head?
Oysters
No Yes Total
Cases 2 51 53
Controls 31 33 64
Total 33 84 117
What is the probability that:
a. A person in this sample was a case?
b. A person ate oysters given that s/he was a case?
c. A person ate oysters given that s/he was not a case?
d. A person ate oysters and was a case?
Are case status and oyster consumption independent?
HPV
CIN no yes
no 16,849 3.624 20,473
yes 127 546 673
16,976 4,170 21,146
a. What is the probability that a person positive for HPV has
CIN?
b. What is the probability that a person negative for HPV has
CIN?
c. What is the relative risk for HPV for CIN?Return to the home page.