What is the critical difference between determining the probability of observing a value equal to or greater than a raw score (X) versus the probability of observing a value equal to or greater than a sample mean? a. the raw score computation uses the standard deviation of the population whereas the sample mean value uses the standard deviation of the sampling distribution. b. there is no difference, both use the same Z-score formula and Standard Normal Tables. c. the raw score computation requires we know the mean and standard deviation of the population whereas the sample mean value uses sample data to estimate these values. d. the raw score computation uses the mean of the population whereas the sample mean value uses the mean of the sample data