- [Maximum mark: 13]
restaurant floorplan with Voronoi diagram
(a) Write down the coordinates of A. [1]
(b) Find
(i) the coordinates of the midpoint of [CD] [2]
(ii) the equation of the perpendicular bisector of [CD]. Give your answer in the form y = mx + c. [6]
(c) Using nearest‑neighbour interpolation, find the average waiting time for a customer at point (4, 6). [1]
(d) State the alternative hypothesis. [1]
(e) (i) State which one of the following methods best describes the owner’s planned sampling: convenience, systematic, or stratified. [1]
(ii) State one disadvantage of this sampling technique. [1]
(f) State the conclusion for the test. Justify your answer. [2]