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? The mean of sample A is a point estimator for the mean of the population. The mean of sample B is a point estimator for the mean of the population. The mean of sample A is equal to the mean of sample B.

Thayer sometimes finds it difficult to understand what his instructor is saying. he raises his hand in class and asks his instructor to elaborate on what was just said, but it rarely . what should thayer do to overcome this obstacle? a. during class, ask other students what the instructor means b. raise more questions in class c. join a study group of his peers d. try to do the best he can with the information he has