& Problem 10 in Chapter 9 described a study by Hartow

(1959) in which ant ant monkeys were placed in cages with rio artificial "mothers," One mother was made of wire mesh and had a bottle from which the infant could feed, and the second mother was made of son terry cloth but did not provide my food Data for a sample of n = 9 monkeys showed that the infants spent an average of W =15.4 hours per day with 85 = 216 with the terry cloth mother. Use the data to estimate how many hours per day would be apens with the terry cloth mother fce the capire population of infant monkeys. Make a point eniitute and an 309 confidence interval estimate of the popialatiun medall.