Wildlife conservationists studying grizzly bears in the United States found that the mean weight of 25 adult male grizzly bears was 600 pounds with a sample standard deviation of 90 pounds. Construct a 98% confidence interval for the mean weight of all adult male grizzly bears in the United States. Assume that the weights of all adult male grizzly bears in the U.S. are normally distributed. For this question, what is the margin of error? Give your answer to three decimal places.