Mac and Nick collected data from a random sample of students at their school to see if they could use a linear model to predict y = a student’s grade point average from x = the number of text messages a student sent on the previous day. Here is the residual plot for that model.
Use it to determine whether the regression model is appropriate. (LT 2.7.1 #2)
answer choices
Because there is a leftover pattern in the residual plot, the least-squares regression line is not an appropriate model for the relationship.
Because there is a leftover pattern in the residual plot, the least-squares regression line is an appropriate model for the relationship.
Because there is no leftover pattern in the residual plot, the least-squares regression line is not an appropriate model for the relationship.
Because there is no leftover pattern in the residual plot, the least-squares regression line is an appropriate model for the relationship.