I have a calculated a descriptive statistics for the variable (coin) where each student flipped the coin 10 times. The mean is 4.886 and the standard deviation is 1.469. I have calculated the mean and deviation for a binomial distribution with the probability of success being 1/2 and n=10. the mean is 5 and the standard deviation is 1.581. What do these 2 problems have in common?