An insurance company is reviewing its current policy rates. When originally setting the rates they believed that the average claim amount was $1,900. They are concerned that the true mean is actually higher than this, because they could potentially lose a lot of money. They randomly select 25 claims, and calculate a sample mean of $2000. Assuming that the population standard deviation of claims is $500, test to see if the insurance company should not be concerned (level of significance = .05)