Item 10 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. I only 1 only A II only 2 only B III only 3 only C I and II 1 and 2 D II and III