Descriptive or Inferential Statistics Determine whether each of the following is a descriptive or an inferential statistics problem.

a. The Society of Government Economists conducted a salary and working conditions survey of top bank executives in the United States. A report issued by this group included a table that listed the number of bank executives in each state with salaries above $1 million.

b. The Flowers Canada Growers obtained a sample of people who sent roses for Valentine's Day and recorded the color of the roses purchased. This information was used to construct a table listing the proportion of each color of rose purchased on Valentine's Day.

c. The Intergovernmental Panel of Climate Change collected data associated with global warming and predicted the extinction of up to 30% of plant and animal species in the world.

d. American Express conducted a survey of travelers at Los Angeles International Airport. The information was used to estimate the proportion of all travelers who make a purchase in an airport duty-free shop.