Drinking Coffee
The data collected in 2011-2012 by Australian Bureau of Statistics asked whether people consumed coffee and coffee substitutes on a daily basis.
The table gives the total number of people in each age range (rounded) and the percentage who said they consumed coffee and coffee substitutes.
a. Make a two-way table of counts (not percentages). The table is started below:
b. What is the tendency? Which group is most likely to consume coffee and coffee substitutes, and which group is least likely to consume coffee and coffee substitutes? Does this make sense to you?
c. From your table, if one person is selected, what is the probability that this person is in the age range of 19-30 AND consumes coffee and coffee substitutes on a daily basis?
d. If you select a person from the people who drink coffee, what is the probability that this person is in the age range of 19-30 years?
e. If you select a person in the age range of 19-30, what is the probability that this person consumes coffee?
f. Why is the probability in part c smaller than those in parts d and e?