:3a. (This is a continuation of the preceding problem.) My neighbor now tells me that he has used the scale he lent me to weigh cats dozens of times, and that the SD of the weights he obtained is 1 pound. Maybe this new information should be used to recompute the confidence interval. Maybe not. Whatever you decide, a correct confidence interval for the weight of my cat is now closest to

a. from 3 to 29 pounds b. from 13 to 19 pounds

c. from 14.5 to 17.5 pounds

d. from 0 to 20 pounds

e. a sample of size two is still too small for a 95% confidence interval to be found