A researcher is interested in whether infants' attention to their mothers' voices increases in the first week of life. Let's assume an established baseline exists showing that infants attend to their mothers, on average, for 5.867 seconds on their first day. The researcher selects 9 full-term infants in normal health who experienced uncomplicated deliveries and tests the number of seconds the infants oriented in the direction of their mother's voice on Day after delivery. The fictional data are given in the table Infant Attention.

Perform all six steps of hypothesis testing on these data using a nondirectional hypothesis test:

Table: Infant Attention

(seconds)

7

7

6

8

8

8

8

8

6