1. Academic Performance Index Regression Analysis
... variables had factors larger than five. We checked the assumptions of linear regression: linear trend of the data (shown in Plot 1, Page 8) each quantitative variable has a linear relationship with the outcome and with other predictor), independence of observations (each school is reasonably assumed to be independent from other observations), normal distribution of the observations (shown in Plot 3, Page 9) the close adherence ... . Based on natural cuts in the data at about the median, we chose to split this variable halves, with each corresponding to either a low or high average parents...
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