A medical researcher at the State University of New York at Stony Brook is interested in the average blood pressure of men in their 50s who reside in Stony Brook. Since the researcher does not have the resources to measure the blood pressure of all men in their 50s who live in Stony Brook, she takes a sample and calculates the average blood pressure for the sample. A major benefit of the medical researcher using a sample rather than all men in their 50s who live in Stony Brook is that it isless expensive . The use of allows the medical researcher to estimate the population mean based on a sample that is quite small in comparison with the size of the population