Suppose you conducted a study to test the hypothesis that social pressure affects memory accuracy. You set up a study in which participants view a video of a person robbing a convenience store. Then, half of the participants watch a video of other participants discussing the crime. In reality, the participants in the video are part of the experiment, and some of the details of the crime that are discussed are inaccurate. The actual participants are told that they should consider other people’s perspectives on the crime because it is difficult for any one person to accurately remember all the details. The other half of the participants do not view the video discussion of the crime but are also told that it is difficult for any one person to accurately remember all the details of the crime. Thirty minutes after viewing the original crime video, all participants are given a recognition memory test about details of the crime. For this study, answer the following questions:
a. What are the alternative and null hypotheses for this study?
b. Suppose that 10 participants participated in each group in the study. For the recognition accuracy data provided below, conduct an independent samples t test to analyze these data.
· Video Discussion Group: 67, 80, 69, 72, 75, 79, 66, 71, 69, 79
· No Video Discussion Group: 78, 65, 79, 84, 88, 79, 89, 90, 85, 87
c. From the test result you obtained, what can be concluded about the null hypothesis you stated?