When participants who arrive for a research study are put into treatment groups on the basis of chance, A. The research findings will be compromised because you should never randomly assign to groups B. Random assignment has occurred. C. Random sampling has occurred D. The statistical conclusions will also be absolutely correct.

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

Which of these tools or constructions is used to inscribe a hexagon inside a circle?