Question: In the Preview for this chapter, we discussed a study that examined the effect of eye-spot patterns on the behavior of moth-eating birds (Scaife, 1976). The birds were tested in a box with two chambers and were free to move from one chamber to another. In one chamber, two large eye-spots were painted on one wall. The other chamber had plain wall. The researcher recorded the amount of time each bird spent in the plain chamber during a 60 -minute session. Suppose the study produced a mean of \(M=37\) minutes on the plain chamber with \(SS=288\) for a sample of \(n=9\) birds. (Note: If the eye spots have no effect then the birds should spend an average of \(\mu=30\) minutes in each chamber).

1. Is this sample sufficient to conclude that the eye-spots have a significant influence on the bird behavior? Use a two-tailed test with \(\alpha= .05\)
2. Compute the estimated Cohen's \(d\) to measure the

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