Mean and variance are two statistics defined for both the population and the sample. What is the difference? Group of answer choices The value of the sample mean/variance is always less than the value of the population mean/variance, since the sample size is less than the population size. The value of the population mean/variance varies from sample to sample, whereas there is just one value for the sample mean/variance. The value of the sample median/variance is always less than the value of the population mean/variance, since the sample size is less than the population size. The value of the sample mean/variance varies from sample to sample, whereas there is just one value for the population mean/variance