The research question is whether attractiveness affects the behavior of infants looking at photographs of women's faces. The researcher is expecting the infants to prefer the more attractive face. Therefore, the researcher predicts that the infants will spend more than half of the 20-second period looking at the attractive face. Specifically, the researcher tested a sample of n = 9 infants and obtained a mean of M = 13 seconds looking at the attractive face with SS = 72.

Step 1: State the hypotheses for a one tailed test.

Step 2: Report aone-tailedcritical t-value for the alpha level at 0.01.

Step 3: Calculate the t statistic and show your work.

Step 4: Make a decision.