PROBABILITY AND STATISTICS
CHAPTER 3 NOTES
WARM-UP
Respondents in three cities were asked whether they would buy a new breakfast cerealthat was being tested. Use the responses from the contingency table below to answer thequestions.
Fort WorthDallasChicagoRow Totals
Yes (Y)100150150400
No (N)12513095350
Undecided (U)751705250
Column Totals3004502501000
A.What is the probability that the person responded yes?
B.What is the probability that the person is from Dallas?
C. What is the probability that the person responded yes, and is from Dallas?
D.What is the probability that the person responded yes or is from Dallas?
E.What is the probability the person responded yes, given that they are from Dallas?
F. What is the probability that the person is from Fort Worth, given that they respondedyes?