Is it a good predictor of new cases: options 1. Yes because of small p Val 2. No because it has a bad R-squared 3. No because it has a small p Val 4. Yes because it has a good r squared On day 30 (feb 20) there was 532 new cases confirmed... what is the residual for this point? Options: 5671, 5139, 532, -5139, -5671, -532 Can we use the regression line to predict new cases worldwide for the 100? Options: we can, and the prediction would be reasonable for this; we cannot mathematically we can't put X equals 100 in the equation; we cannot mathematically we can't, but why equals 100 in the equation, we can, but we shouldn't that would be extra pollution in the prediction would be way off. In order to get a better fit for the data we should ; Delete day as predictor ; delete new cases worldwide as predictor; add an interaction term; add a quadratic term for a day.