Question: A state has just changed one of its toll roads
A state has just changed one of its toll roads from human collection of tolls to machine collection. The idea behind the change was to allow traffic to flow more smoothly through the toll plaza. With human attendants, the mean number of cars passing through the toll plaza was 1253 per hour. A random sample of 100 days under the new machine system of toll collections show a mean of 1261 cars passing per hour with a standard deviation of 59. Have the machines improved the flow of traffic through the toll plaza?
Answer to relevant QuestionsLucia Letter-Carrier, chief analyst for the U.S. Postal Service, will testify before Congress next week on the Service’s parcel delivery efforts. She needs to be concerned about a charge that the delivery time is taking ...The Iowa State University Agriculture Research Team is concerned about the impact of the recent drought on the productivity of the state’s corn crop. During the last 10 years, Iowa’s corn crop has averaged 32.4 bushels ...The Whitehawk Indian Tribe wants to know the average number of absences for each student at the elementary school run by the Bureau of Indian Affairs (BIA). The tribe members believe that the number of absences is at least ...If the error rate for TANF (Temporary Assistance for Needy Families) payments is greater than 5%, the federal government will cut off funding to the state of Utah. To see whether this is a problem, the agency director takes ...Wisconsin state Senator Jesse P. Rude has charged that state employees in Madison are often too stoned to work. He thinks as many as 10 percent of all state workers in Madison are frequent users of marijuana and other drugs. ...
Post your question