If Ho: B1 = 0 is not rejected, what is the best estimate for the value of the response variable for any value of the explanatory variable?
1. The best estimate is the mode of the sample y values
2. The best estimate is the sample mean of y
3. The best estimate is the value of the response variable for the data point closest to the particular value of the explanatory variable. If there is more than one data point in that value, it is the mean of the response variables at that point.
4. There is no way to estimate the value of the response variable.