How large are hamster litters? Among 47 golden hamster litters recorded, there were an average of 7.72 baby hamsters, with a standard deviation of 2.5 hamsters per litter.
a) Create and interpret a 90% confidence interval.
b) Would a 98% confidence interval have a larger or smaller margin of error?
c) Would you need more or fewer litters to create a 95% confidence interval of the same size as the one in part a)?