The factors that affect the visibility of powered two-wheelers (PTWs)motorcycleson the road were investigated in a study. Avisual search study was conducted in which viewers were presented with pictures ofdriving scenarios and asked to identify the presence or absence ofa PTW. Of interest to the researchers is the detection rate, that is, the proportion of pictures showing a PTW in which the viewer actually detected the presence of the PTW. Suppose that, in theory, the true detection rate for pictures of PTWs is 0.69. The study revealed that in a sample of 2,105 pictures that included a PTW, only 1,427 were detected by the viewers. Use this result to test the theory at a: 0.10