definition of a in-sample in sample forecast definition what means in-sample forecasting what is in-sample forecasting what is out of sample what is in sample forecasting what is in-sample forecasting what is the in-sample forecast when do you use in sample or out of sample what is a in-sample forecast which is the difference between in-sample and sample in forecasting? what is the in-sample approach in sample vs out of sample definition how to conduct in sample forecasting in sample definition what is out of sample forecasting what is in-sample forecast in sample forecasting definition what is in-sample forecasting what is out of the sample