Pea aphids,Acyrthosiphon pisum, are small, wingless, sap-sucking insects that live on plants. They evade predators (such as ladybugs) by dropping off. A study examined the mechanism of aphid drops. Researchers hung live aphids upside down from delicatetweezers and then released them. The videotaped drops show that27of the30 aphis landed on their legs. Is this evidence that live aphids land right side up (on their legs) more often than chance alone would predict?To answer this question, complete the following steps:

1)State the null and alternative hypotheses.

2)Compute the test statistic and p-value.

3)Make a decision.

4)Interpret your decisionin terms ofthe problem context.