Aresearcher that that designs a study that will be the same study as another person's study but the specific people involved in the study are different is performing what kind of study?

The arizona department of transportation wishes to survey state residents to determine what proportion of the population would like to increase statewide highway speed to 75 from 65 mph. at least how many residents do they need to survey if they want to be at least 99% confident that the sample proportion is within 0.09 of the true proportion?

Which of the following was discovered in the piedmont region of north carolina in 1799?

How has congress added to the president’s role as chief economic planner over the years?