1) The results of a state mathematics test for random samples of students taught by two different
teachers at the same school are shown below. Can you conclude that that there is a difference
in the mean mathematics test scores for the students of the two teachers. Use a=0.10. Assume
the populations are normally distributed and the population variances are not equal.

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv