A study was conducted concerning the effects of varying lengths of unemployment and exposure to an acute laboratory stressor on ability to concentrate. Data represent subjects' proofreading scores (percent errors found). Finding fewer errors is a behavioral indicator of stress. Length of unemployment was regarded by the researchers as an indicator of exposure to chronic stress. Ten (10) subjects were included in the study, and they were followed from the time shortly after they became unemployed through across time (short and long) periods of unemployment. Data were collected as below: Length of Unemployment Control Short Long 55 64 43 60 60 38 Stress 63 60 70 Exposure 51 60 27 66 56 31 84 59 65 Control 90 51 44 95 48 55 81 66 48 62 64 41 a. Analyze the data. You may use SPSS for the analyses