Alia works for a website that helps customers see how much different cars may cost. She wants to estimate the average selling price for a particular car, so she takes a random sample of 200 selling prices for that car (more than 2000 of these cars have been sold). The data are roughly symmetric with a sample mean selling price of x=19821 . There are some outliers in each direction. She's considering using her data to make a confidence interval for the mean selling price of this car. Which conditions for constructing a interval have been met?
