A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. Asample of 15 librarians from each city was randomly selected. The mean from the first city was $\$ 28,900$ with astandard deviation of $\$ 2300$. The mean from the second city was $\$ 30,300$ with a standard deviation of $\$ 2100$. Test the hvpothesis that the mean salaries from SP.VS. 833