what would be the population and hypothesis of this study:

A researcher is interested in infants' attention to their mothers' voices. The research wants to know if the infant's attention increases to the mother's voice after spending the first week of life with the mother. The researcher selects 10 full-term infants with normal health who experienced uncomplicated deliveries and tested the number of seconds that the infant oriented in the direction of the mother's voice on Day 1 and on Day 7 after delivery. These fictional data appear below. Use an = 0.01 Day 1 Day 7: 6 7 5 7 3 6 8 8 7 9 6 8 5 5 6 8 8 7 5 8