what can you conclude about the relationship between a sample mean and the population mean. A. The sample mean varies sample to sample. somtimes it overestimates and sometimes it underestimates the population mean. B. No matter how many times we select a sample, the sample mean is always equal to the population mean. C. Everytime we select a sample, the sample mean always everestimates the population mean or D. Everytime we select a sample, the sample mean always underestimaes the population mean