3. A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sample of 15 teachers from each district was randomly selected. Test the claim that the salaries from both districts are equal. Use significance 0.05 and assume that the data are distributed normally. 11 & S District 1: 15 $28,900 $2,300 District 2: 15 $30,300 $2,100 3A. What is the appropriate set of hypotheses (H0, H1)? - = 0, 1-z 0, 1-2=0 - = 0, <0 - 2> 0 -2=0, 3B. What is the correct confidence interval? (-2475,-325) (-2100,-700) (-2975, 175) (-3125, 325) 3C. Are the salaries of the teachers from the two districts different? Yes. No. Sometimes. . Depends on distribution