Question 20 3 pts Which one of the following is a false statement about the standard deviation, s, of the lengths, in inches, of a sample of rainbow trout? s can be less than zero. O s is measured in inches. If the lengths of the trout vary, then's must be greater than 0. O s would increase if we added an unusually short trout to our sample O A small s indicates that the data values are closely clustered around the mean