Fish stock assessments use scientific information to determine the abundance of fish in an area. Stock assessments provide valuable data that informs decisions regarding overfishing and the ideal yield from United States fisheries. Fish stocks are assessed and monitored by the National Oceanic and Atmospheric Administration (NOAA). Linear regression can be used to determine whether fish population size is a significant predictor of fishing mortality. In 2015, researchers for NOAA obtained fish population size results and fishing mortality rates from a random sample of n=67 Alaska stocks (Fish Assessment Report, 2015). The researchers can use a t- test to see if the sample data provided evidence of an association between fish population size and fishing mortality rate, where the equation of the population regression line is