In: Statistics and Probability
A research on speeding violations and drivers who use car phones indicated the following outcomes:
Speeding Violation in the Last Year |
No Speeding Violation |
Total |
|
Car Phone User |
25 |
280 |
305 |
Not a Car Phone User |
45 |
405 |
450 |
Total |
70 |
685 |
755 |
a) Referring to the table, calculate the following probability: “person is a car phone user OR person had no violation in the last year”.
b) Referring to the table, calculate the following probability: “person is a car phone user GIVEN person had a violation in the last year”.
c) Referring to the table, calculate the following probability “person had no violation last year GIVEN person was not a car phone user”.
d) Referring the table, calculate the following probability “person had no violation in the last year AND was a car phone user)”.