what is qq plot does the tangent point of the curve indicate a categorical variable which of the following is an independent test for statistical significance? what is the tangent value in the qq plot for linear regression what is qq plot how to test the statistical significance of categorical variable in regression model what is the qq curve what is qq in a curve what does qq mean which point is the curve tangent to the 45 degree line? what is a qq plot used to do in linear regression lm model tangent curve how do you compare categorical and normal variables what is the curve of qqline in linear regression how do you test statistical significance in linear regression why does a qq curve look so non normal what is a qq plot which is better tangent to a straight line or non-normal what is the curve called for nonnormal data how do you find a model that has a tangent curve