sider the following statistical studies: • 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. • 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. • 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. . 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. • The Food Channel conducted a blind taste test to determine the best chocolate for baking. A random sample of adults was obtained, and each was asked to select the best chocolate from among 10 varieties. The final report listed each chocolate along with the number of people who rated it the best. . After an extensive survey, the Association of Realtors in Chicago concluded that the mean price of a single-family home was less the $500, 000. . After conducting several measurements, the Beijing Municipal Environmental Monitoring Center issued a warning that indicated the density of PM2.5 (fine particulate matter, a measure of air pollution) was over the safe limit. • International Living issued a report listing percentages of Americans retired and living in each foreign country. • The Nebraska Department of Transportation maintains records concerning all trucks stopped for inspection. A report of these inspections lists the proportion of all trucks stopped, by cargo. • Eric Knudsen, a researcher at Stanford University Medical Center, obtains a random sample of wild owls and measures how far each can turn its neck. The data are used to conclude that an owl can turn its neck more than 120 degrees from the forward position. . A Navy research facility runs several tests to check the structural integrity of a new submarine. A laboratory report states the vessel can withstand pressure at depths of at most 800 ft. • A safety inspector in Atlanta selects a sample of apartment buildings and checks the fire ladders on each. The proportion of broken ladders in the sample is used to estimate the proportion of broken fire ladders in the entire city. • A report from the Louisiana Department of Agriculture and Forestry lists the prices paid for raw forest products at the first point of sale. In how many of these studies inferential statistics was/were used? (Type your answer in numerical form, like 9.)