The Wall Street Journal compared the cost of adopting children from China with that of Russia. For a sample of 16 adoptions from China, the mean cost was $11,045, with a standard deviation of $835. For a sample of 18 adoptions from Russia, the mean cost was $12,840, with a stand deviation of $1,545. Can we conclude the mean cost is larger for adopting children from Russia. Assume the two populations standard deviations are not the same. Use the .05 significance level.