Among 20 golden hamster litters recorded, there was a sample mean of x = 7.72 baby hamsters, with a sample standard deviation of s = 2.5 hamsters per liter. Create a 98% confidence interval for the mean number of baby hamsters per liter. a) 07.72 + 1.4196 b) ( 7.72 + 0.5590 c) 07.72 + 2.50 d) 07.72 + 1.3005