Based on the Journal of the American Medical Association, weights of all newborn

Based on the Journal of the American Medical Association, weights of all newborn babies in U.S. follow a normal distribution with a mean of 3420 grams and standard deviation of 500 grams. The weights of 625 randomly selected newborns were recorded and it was found that the average and standard deviation in this sample were 3450 grams and 490, respectively. Which of the following statements is consistent with the idea of sampling variability? a. If we were to select a different random sample of 625 newborns, the mean and standard deviation in this sample will be exactly the same as in the population - 3420 and 500, respectively b. If we were to select a different random sample of 625 newborns, the mean and standard deviation in this sample will be exactly the same as in the first sample -- 3450 and 490, respectively. c. If we were to select a different random sample of 625 newborns. We can expect the mean and standard deviation in this sample to be different than the mean and standard deviation in the first sample. d. If we were to select a different random sample of 625 newborns we can expect that not all newborns will have the same weight.