Problem
Paul Piff and colleagues have conducted several studies to examine the relationship between socio-economic status and ethical behavior. In one study (Piff, Stancato, Cote, Mendoza-Denton, & Keltner, 2012), two research assistants observed the behavior of 152 drivers at a pedestrian crosswalk in San Francisco. They recorded whether the vehicle yielded to pedestrians. They also rated the vehicle according to status, on a scale of 1(lowest status) to 5 (highest status). They found that "upper-class drivers were significantly more likely to drive through the crosswalk without yielding to the waiting pedestrian" (p. 4087). This was part of a set of results that led them to the conclusion that "individuals from upper-class backgrounds behaved more unethically in both naturalistic and laboratory settings." (p. 4088). Answer the following questions:
1) What kind of reliability would need to be evaluated for the measure of vehicle status?
2) Draw a scatterplot that would indicate that the measure of vehicle status has good reliability. Label your axes (use a paper and pen, then take a picture and upload it, and insert it here).
3) Draw a scatterplot that would show it had poor reliability (use a paper and pen, then take a picture and upload it, and insert it here).