Samples A and B were selected from the same population. The mean of sample A is equal to the mean of the population.
Which of the following statements must be true?
I) The mean of sample A is a point estimator for the mean of the population.
II) The mean of sample B is a point estimator for the mean of the population.
III) The mean of sample A is equal to the mean of sample B.

Answers:
A) I only
B) II only
C) III only
D) I and II
E) II and III

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.